Two issues 1 are presented: 1) whether the appellee, Lois L. Flowers Hooper (Hooper/adopted daughter/pretermitted heir), qualifies as a pretermitted heir under 84 O.S.1991 § 132;2 and 2) whether extrinsic evidence is admissible to demonstrate the adoptive mother’s intent. We find that: 1) The passage of the Uniform Adoption Act (Adoption Act), 10 O.S.1991 § 60.1 et seq. in 1957 abolished all pre-existing differences between adopted and natural children. Because the clear language of 10 O.S.1991 § 11323 provides that termination of parental rights does not affect a child’s right to inherit from its parent, Hooper qualifies as a pretermitted heir under 84 O.S.1991 § 132.4 and 2) The existence of an order terminating the testatrix’s parental rights is an extraneous fact rendering the will ambiguous. Parol evidence is admissible to ascertain the adoptive mother’s intent.
FACTS
On December 2, 1939, Edna L. Rogers Flowers’ (Flowers/adoptive mother/deceased/testatrix) and her husband adopted the appellee, Lois L. Flowers Hooper (Hooper/adopted daughter/pretermitted heir) and Hooper’s brother, Don L. Flowers (brother/adopted son). Four years later, Flower’s husband petitioned the Okfuskee County Court to declare Hooper a delinquent child. At the hearing on the petition on June 30, 1943, Hooper was found delinquent. Hooper’s care and custody were committed to the State. The Flowers relinquished all rights as parents of Hooper; and the court’s order provides that they were released from all further liabilities and responsibilities as Hooper’s parents.5 The Flowers made no attempt to terminate their rights to their adopted son. From *11491943 until she reached majority, Hooper remained in foster care. Her support was provided by the State of Oklahoma. Between her placement in foster care and 1982, Hooper testified that she visited with her adoptive mother approximately five times. On at least one of these occasions, Flowers traveled to Tulsa to see Hooper. On another, Hooper claims to have lived with her adoptive mother for a short period of time. There were also alleged telephone contacts.
Flowers executed her will on June 27, 1989. She died on May 14, 1990. On May 21,1990, Debbie Parker, the named personal representative, filed Flowers’ will for probate. The appellants, Nola Clinking-beard, Lillian Fowler, Ratha Reynolds and Fay Davis Dattuso (collectively, beneficiaries/sisters), are Flowers’ sisters. They are all named as devisees and/or beneficiaries in Flowers’ will.
On June 1, 1990, Hooper filed a petition to receive Flowers’ estate as a pretermitted heir pursuant to 84 O.S.1991 § 132.6 This cause arises out of the sisters’ objection to Hooper’s petition. On August 21,1990, the trial court held a hearing in which oral and documentary evidence were presented. The trial court found that Hooper qualified as a pretermitted heir and that nothing on the face of the will indicated an ambiguity allowing the introduction of extrinsic evidence.7 The Court of Appeals affirmed. It found that: 1) adoptive parents’ parental rights could not be legally severed in 1943; and 2) extrinsic evidence was not admissible to establish the testatrix’s intent to disinherit her adopted daughter. We granted certiorari on November 23, 1992, to determine: 1) whether the termination of parental' rights affects the adoptive daughter’s right to inherit from her adoptive mother as a pretermitted heir under 84 O.S.1991 § 132; and 2) whether parol evidence is admissible to ascertain the adoptive mother’s testatorial intent.
I.
THE PASSAGE OF THE UNIFORM ADOPTION ACT (ADOPTION ACT), 10 O.S.1991 § 60.1 ET SEQ. IN 1957 ABOLISHED ALL PRE-EXISTING DIFFERENCES BETWEEN ADOPTED AND NATURAL CHILDREN. BECAUSE THE CLEAR LANGUAGE OF 10 O.S.1991 § 1132 PROVIDES THAT TERMINATION OF PARENTAL RIGHTS DOES NOT AFFECT A CHILD’S RIGHT TO INHERIT FROM ITS PARENT, HOOPER QUALIFIES AS A PRETERMIT-TED HEIR UNDER 84 O.S.1991 § 132.
Both parties argue that a primary issue in the cause concerns Hooper’s status as an adopted child. Clinkingbeard asserts that the trial court had the authority to sever the parental relationship between an adopted child and his/her adoptive parents in 1943. Hooper insists that the trial court lacked authority to terminate the parent-child relationship absent a second adoption. However, this issue is not dispositive.8 As *1150the following discussion demonstrates, even if the parental tie was severed in 1943, Hooper qualifies as a pretermitted heir under 84 O.S.1991 § 132.9
In 1957, Oklahoma adopted the Uniform Adoption Act (Adoption Act), 10 O.S.1991 § 60.1 et seq. In Conville v. Bakke, 400 P.2d 179, 192-93 (Okla.1964), this Court discussed the Legislature’s intent in enacting the Adoption Act. We specifically recognized in Conville that in repealing the prior law relating to the inheritance rights of adopted children the Legislature intended that all adopted children — those adopted before 1957 and those adopted after enactment of the Adoption Act — be treated similarly. An argument that the pre-1957 adoption law remained in effect for the purpose of determining heirs of persons dying after 1957 if the heir was adopted prior to the effective date of the Adoption Act was found unpersuasive.
In Conville, we recognized the Legislature’s authority to provide for the prospective operation of a statute. We also noted that the Legislature did not exercise that authority in the Adoption Act. Instead, it created a system in which all adopted children are treated similarly for the purposes of inheritance and moved Oklahoma into the modern trend of placing adopted children upon the same footing as natural offspring. We will not today step back, through judicial fiat, to a system which treats those children differently based upon their date of adoption. Were we to do so, it would unravel the law established by judicial decision, and result in the creation of an unconstitutional special law10 and a denial of equal protection under the law.11
The findings of Conville were reinforced in Hines v. First Nat’l Bank & Trust Co., 708 P.2d 1078, 1080 (Okla.1985). Hines involved the right of a an adopted child to inherit from the lineal kindred of the adoptive parent. In Hines, we stated:
“Although, the Uniform Adoption Act was not enacted until 1957, and the appellant was adopted in 1950, generally the right of an adopted child to inherit is decided by the law in force at the death of the testatrix/testator not the date of the adoption.”
The child in Hines, adopted in 1950 — seven years before the enactment of the Adoption Act — was found to be entitled to inherit from its lineal ancestors although inheri*1151tance would not have been allowed under the prior law.
Hein v. Hein, 431 P.2d 316, 318 (Okla.1967), was promulgated after Con-ville and before Hines. However, it provides good rationale for an across-the-board application of the Adoption Act. In Hein, we refused to apply the Adoption Act where the testator died before the Act’s adoption. In doing so, we reasoned that a will is ambulatory during the maker’s life and may be changed until the date of death. Certain presumptions are indulged in ascertaining a decedent’s intent. In Hein, we determined that a testator/testatrix is presumed to know the law in effect at the time of the execution of a will. Here, when the adoptive mother executed her will in 1989, the current Adoption Act had been in force and effect for thirty-two years; Conville and Hines had been part of our jurisprudence for twenty-five and four years, respectively.
The Adoption Act abolished all pre-existing differences between adopted and natural children.12 The right of an adopted child to inherit is decided by the law in force at the death of the testatrix/testator not the date of the adoption.13 Flowers died in 1990, after the Adoption Act became law. Under the Adoption Act, the adoption decree establishes the relationship of natural parent and natural child between the adoptive parent and the adopted child for all purposes — including the mutual rights of inheritance and succession. Adopted children may not be eliminated as beneficiaries or as devisees absent a clear and explicit expression to do so.14
Title 10 O.S.1991 § 1132 15 describes the effect a termination of parental rights has on the parent-child relationship. Section 1132 provides that the termination of parental rights negates the parent’s rights to inherit from the child. The statute specifically provides that termination shall not “in any way affect the right of the child to inherit from the parent.” The determination of legislative intent controls judicial statutory interpretation.16 However, it is unnecessary to apply rules of construction to discern Legislative intent if the will is clearly expressed.17 Pursuant to the plain language of § 1132, termination of parental rights does not affect the right of the child to inherit from the parent. Because Flowers died after the enactment of the Adoption Act abolishing all differences between natural and adopted children and because the clear language of 10 O.S.1991 § 1132 provides that termination of parental rights shall not affect a child’s right to inherit from its parent, Hooper qualifies as a pretermitted heir under 84 O.S.1991 § 132.18
II.
THE EXISTENCE OF AN ORDER TERMINATING THE TESTATRIX’S PARENTAL RIGHTS IS AN EXTRANEOUS FACT RENDERING THE WILL AMBIGUOUS. PAROL EVIDENCE IS ADMISSIBLE TO ASCERTAIN THE ADOPTIVE MOTHER’S INTENT.
The sisters assert that the existence of the order terminating the parental tie between Flowers and Hooper creates an ambiguity in the will which may be ex*1152plained by the introduction of parol evidence. Hooper insists that extrinsic evidence may be used only when there is an ambiguity on the face of the will. We disagree.
Both parties rely upon this Court’s pronouncement in Matter of Estate of Crump, 614 P.2d 1096, 1098 (Okla.1980). In Crump, we recognized the general rule that under 84 O.S.1991 § 18219 — the pre-termitted heir statute — intentional omission to provide for the testator’s issue must appear from the four corners of the testator’s will. However, the Court also noted an exception to the parol evidence rule. Under this exception, parol evidence is admissible to resolve ambiguous expressions used in the text or created by the existence of facts extraneous to it.20 The only argument made in Crump for the application of the exception to the parol evidence rule was premised on the testator's disposition of his entire estate. Testatorial disposition of an entire estate does not alone evince an intent to omit to provide for a child or a deceased child’s issue.21 Parol evidence was not allowed to show the testator’s intent to disinherit his granddaughter in Crump.
The instant cause is similar to Crump in that the entire estate was given to Flowers’ sisters in the will. The cause differs in that there is an extraneous fact making the will ambiguous — the termination order, duly filed in a court of record and admitted by the trial court. The very existence of this order raises questions concerning Flowers’ intent. If Flowers thought the termination order ended any relationship between she and Hooper, the failure to mention Hooper in the will may well have been intentional. If she believed that some familial relationship continued to exist, did Flowers' stated intent to disinherit her adopted son and his “kin” coupled with the false statement that she had only an adopted son create an ambiguity within the will?22 The intention of the testator is controlling; when the Court construes a will, it must ascertain and give effect to the testator’s intent, unless the intent attempts to effect what the law forbids.23 Here, the termination order makes the admission of extrinsic evidence necessary to détermine intent. We find that the existence of the termination order is an extraneous fact rendering the testatrix’s will ambiguous. Parole evidence is admissible to ascertain the adoptive mother's intent.
CONCLUSION
Whether Hooper’s legal relationship as a child was severed by the termination order does not affect her status as a pretermitted heir. The law in existence at Flowers’ death is controlling. Because Flowers died after the passage of the Uniform Adoption Act (Adoption Act), 10 O.S.1991 § 60.1 et seq. and because, pursuant to 10 O.S.1991 § 1132,24 termination of parental rights does not affect an adopted child’s right to inherit from its adoptive parent, Hooper qualifies as a pre-termitted heir under 84 O.S.1991 § 132.25 Generally, extrinsic evidence is not admissible to show testamentary intent under the pretermitted heir statute, 84 O.S.1991 § 132.26 An exception to the rule is allowed when the will is rendered ambiguous by an extraneous fact.27 Here, the exis*1153tence of the termination order is an extraneous fact rendering the provisions of the will ambiguous. Parol evidence is admissible to establish intent.28
CERTIORARI PREVIOUSLY GRANTED; COURT OF APPEALS OPINION VACATED; AFFIRMED IN PART; REVERSED IN PART AND REMANDED.
ALMA WILSON, SUMMERS and WATT, JJ., concur. HODGES, C.J., concurs specially. LAVENDER, V.C.J., and SIMMS, HARGRAVE and OPALA JJ., dissent.. On appeal, Flowers asserted that the testatrix’s stated intent to disinherit her adopted son and his "kin" coupled with the false statement that she had only one adopted child created an ambiguity within the will allowing the admission of extrinsic evidence. This issue is not presented in the petition for certiorari. The question of whether there are ambiguities relating to other issues present in the will at bar is not before us. Matter of Estate of Crump, 614 P.2d 1096, 1099 (Okla.1980). As to the introduction of parol evidence, we address only the issue of whether the existence of an order terminating the testatrix's parental rights is an extraneous fact rendering the will ambiguous.
. Title 84 O.S.1991 § 132 provides:
“When any testator omits to provide in his will for any of his children, or for the issue of any deceased child unless it appears that such omission was intentional, such child, or the issue of such child, must have the same share in the estate of the testator, as if he had died intestate, and succeeds thereto as provided in the preceding section.”
. Title 10 O.S.1991 § 1132 provides:
“The termination of parental rights terminates the parent-child relationship, including the parent’s right to the custody of the child and his right to visit the child, his right to control the child’s training and education, the necessity for the parent to consent to the adoption of the child and the parent’s right to the earnings of the child, and the parent’s right to inherit from or through the child. Provided, that nothing herein shall in any way affect the right of the child to inherit from the parent.”
Unlike the result reached in termination proceedings, we note that a finding of the deprived status of a child does not deprive parents of the child of their parental rights except in limited circumstances. 10 O.S.1991 § 1130.
. Title 84 O.S.1991 § 132, see note 2, supra.
. The Okfuskee County court’s order provides in pertinent part:
"... IT IS THEREFORE the Order of the Court that said child be, and is hereby adjudged a delinquent minor child and is hereby made a ward of the court.
It is further Ordered that said child be, and she is hereby committed temporarily to the care and custody of the Child Welfare Division of the Department of Public Welfare of the State of Oklahoma until further Order of the Court.
It is further ordered that parents, John L. Flowers, and his wife, Edna Louise Flowers, are hereby released from further liabilities and responsibilities as parents of said child, and the care and custody of said child shall henceforth be given to the Child Welfare Divi*1149sion of the State Welfare Department until further Order of the Court....”
. Title 84 O.S.1991 § 132, see note 2, supra.
. The sister’s were prevented from questioning Hooper on specifics as to her relationship with Flowers and other family members. They offered proof that Flowers stated that Hooper was not her daughter after the termination proceedings in 1943; and that Flowers told her sister that her safety deposit box contained papers showing that the adoption had been annulled. The sisters would have presented testimony that an envelope was in Flowers’ safety deposit box containing the termination papers and that on the envelope, Flowers had made the following notation:
"Feb 26 — 1977. Donnie If Louise makes claims to any of my estate this will prove she has no rights to any thing Mom, Edna McDowell”
The envelope also contained a notation in the adoptive father’s handwriting providing: "Louise anul papers.”
The sisters would have offered testimony that Flowers stated that the papers proved that Hooper was not an adopted daughter and that she did not have a daughter.
.Although we do not consider the issue to be dispositive, we do note that in In re Talley’s Estate, 188 Okl. 338, 109 P.2d 495, 498, 132 A.L.R. 773, 777 (1941), decided only two years before Flowers’ attempted to sever the parental bond, this Court determined that the parental rights of adoptive parents could be terminated. The child in Talley was originally adopted from his natural parents. The adoptive parent-child relationship was severed when the natural father adopted the child with the adoptive parents' *1150consent. In Talley, this Court held that the adoptive child was not entitled to share in the first adoptive parents’ estate as a pretermitted heir. However, in so holding, the Court specifically stated that its holding was not premised on a belief that the first adoption was revoked by the second adoption order. Talley appears to turn on the fact that an adoption may sever the natural parents’ right to a child but it does not negate the blood relationship. The Talley court refused to find that an adopted child could inherit from prior adoptive parents in the same manner that an adopted child may continue to inherit from natural parents. The Court of Appeals rejected Talley in Matter of Estate of Baxter, 827 P.2d 184, 188 (Okla.App.1992). After a marriage in 1954, the husband in Baxter adopted his wife's two children. The couple was later divorced. Pursuant to the divorce decree, the husband relinquished all rights to the children and the mother was ordered to “adopt" the children. Upon the father’s death, the adopted children sought to share in his estate. The Court of Appeals rejected Talley holding that the adoptive father’s parental rights were never formally vacated and that the adoptive children were entitled to inherit.
.Title 84 O.S.1991 § 132, see note 2, supra.
. The Okla. Const, art. 5, § 46 provides in pertinent part:
"The Legislature shall not, except as otherwise provided in this Constitution, pass any local or special law authorizing:
... Authorizing the adoption or legitimation of children;
Changing the law of descent or succession
. The Okla. Const, art. 2, § 7 provides:
“No person shall be deprived of life, liberty, or property, without due process of law.” U.S. Const, amend. 5 provides in pertinent part:
"No person shall be ... deprived of life, liberty, or property, without due process of law ...”
U.S. Const, amend. 14, § 1 provides in pertinent part:
"... No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.”
. Hines v. First Nat’l Bank & Trust Co., 708 P.2d 1078, 1080 (Okla.1985); Conville v. Bakke, 400 P.2d 179, 192-93 (Okla.1964); Hurt v. Noble, 817 P.2d 744, 746 (Okla.App.1991); Annot., "Adopted Child as Subject to Protection of Statute Regarding Rights of Children Pretermitted by Will, or Statute Preventing Disinheritance of Child,” 43 A.L.R.4* 948, 952-57 (1986).
. Hines v. First Nat’l Bank & Trust Co., see note 12, supra; Conville v. Bakke, see note 12 at 193, supra.
. Hines v. First Nat’l Bank & Trust Co., see note 12 at 1081, supra.
. Title 10 O.S.1991 § 1132, see note 3, supra.
. Fuller v. Odom, 741 P.2d 449, 452 (Okla.1987); Matter of Phillips Petroleum Co., 652 P.2d 283, 285 (Okla.1982); Becknell v. State Indus. Court, 512 P.2d 1180, 1183 (Okla.1973).
. Fuller v. Odom, see note 16, supra; Northwest Datsun v. Oklahoma Motor Vehicle Comm’n, 736 P.2d 516 (Okla.1987); Duesterhaus v. City of Edmond, 634 P.2d 720, 722 (Okla.1981).
. Title 84 O.S.1991 § 132, see note 2, supra.
. Id.
. See also, In re Estate of Sharp, 512 P.2d 160, 165-66 (Okla.1973); Matter of Estate of Eversole, 787 P.2d 470, 473 (Okla.App.1989).
. Matter of Estate of Severns, 650 P.2d 854, 857 (Okla.1982); Estate of Crump, see note 1 at 1098, supra.
. We do not determine this issue. See discussion note 1, supra. See also, Matter of Estate of Hester, 671 P.2d 54, 55 (Okla.1983) (Testator’s false statement that he had no children combined with complete disposition of property constituted appearance of intention to omit to provide for son.).
. Lomon v. Citizens Nat’l Bank, 689 P.2d 306, 308 (Okla.1984); Matter of Estate of Westfahl, 674 P.2d 21, 24 (Okla.1983); Estate of Smith v. Williams, 674 P.2d 17, 19 (Okla.1983).
. 10 O.S.1991 § 1132, see note 3, supra.
. Title 84 O.S.1991 § 132, see note 2, supra.
. Id.
. Matter of Estate of Crump, see note 1 at 1098, supra.
. The evidence presented by the sisters appears sufficient to establish Flowers intent that Hooper not share in her estate. However, the evidence was presented as an offer of proof. Because Hooper has not had an opportunity to cross examine the witnesses who would testify on behalf of Flowers and because she has not been allowed to present her own supporting evidence on intent, the cause is remanded for a determination of intent by the trier of fact.