This is another episode in the continuing saga of the post-divorce trials and tribulations of the Aussie family that began October 1, 1982, when a judgment of divorce ended a seventeen-year marriage between plaintiff and defendant. That original judgment was appealed to this Court, and a panel of this Court affirmed the judgment of the trial court in an unpublished memorandum opinion decided September 12, 1983 (Docket No. 67504). Since the entry of the divorce judgment, the parties have made repeated visits to the circuit court both to enforce the judgment and to modify it. Additionally, the parties have entered into side agreements, which have not been fulfilled. In short, a great deal of judicial time has been expended in attempts to settle the problems of this family. In the instant case, defendant appeals and plaintiff cross appeals from a post-divorce order for modification of child support and alimony entered in Oakland Circuit Court on September 18, 1987. We affirm in part, reverse in part, and remand.
Defendant is a physician practicing in the fields of obstetrics and gynecology. He is a sole practitioner and is incorporated as a professional corporation. His office is located in Southfield. Defendant sets his own salary and claims an adjusted gross income of $67,400 in 1984, $76,277 in 1985, and $59,000 in 1986. His professional corporation grossed $201,549.78 in 1983, $208,944.49 in 1984, and $207,764.44 in 1985.
Plaintiff, at the time of divorce, was employed at home as a housewife. Following the divorce, plain*458tiff obtained employment in a law firm as a receptionist and secretary. Her adjusted gross income was $25,043 in 1984, $29,942 in 1985, and $34,731 in 1986. These figures include alimony which amounts to $7,800 annually.
Under the terms of the October 1, 1982, judgment of divorce, plaintiff received legal and physical custody of the parties’ three then-minor children: Andrew, born August 1, 1967; Jacqueline, born March 4, 1971; and Jason, born August 14, 1976. Plaintiff was awarded $65 per week per child iri support1 and $150 per week in alimony. The alimony was to be paid only for a period of five years. In addition to the child support and alimony, plaintiff received most of the furnishings in the marital home, with the exception of some rugs given to defendant by his Iranian relatives as gifts which were determined not to be marital property. She was also granted occupancy of the marital home for a period of five years. Because plaintiff was unable to afford the upkeep on the marital home, it was sold and the profits were divided between the parties. She and the children consequently moved to an older, smaller home in need of a great deal of repair and maintenance.
In addition to the rugs, defendant received his professional corporation, his interest in his pension and profit-sharing plans and the stock the parties owned.
The parties’ oldest child, Andrew, attended a private high school, Cranbrook, at the time of the divorce. He finished his secondary education there. In 1985, Andrew turned eighteen and his support terminated. He attends the University of Michigan. He is not self-supporting.
*459Jacqueline turned eighteen on March 4, 1989. Accordingly, her support ended on that date. She is a scholarly, active young woman. She plans to attend college in Arizona. Since the divorce Jacqueline has increased expenses due to her age-related activities.
Jason, the youngest child, was only six when the parties divorced. Although at the time of the divorce the parties recognized that Jason suffered some speech impairment, it was not until after the divorce that they learned that Jason has organic brain damage. As a result of the brain damage, Jason suffers from severe depression, suicidal tendencies, and learning and speech disabilities. He requires special tutoring. He also requires psychotherapy twice a week at $75 per session. Jason participates in sports, in artistic endeavors, and in hobbies such as collecting toy cars and building model airplanes. These activities are encouraged as part of his therapy. It is unlikely that he will ever be self-sufficient. He cannot be left alone because he is disoriented as to time. Jason’s deficiencies have been an additional strain on plaintiff both as to time and financial resources.
The record further reveals that the emotional and financial support of the children has been provided, in large part, by plaintiff. Defendant participates financially only to the extent required by court order. Additionally, defendant has minimized or ignored the problems of Jason and has shown little interest in the children, in general. Defendant’s indifference is evidenced in the following occurrences: (1) Defendant agreed to pay one-half of Andrew’s expenses associated with his enrollment in Cranbrook. He honored this agreement for two years and then refused to pay his share of the expenses incurred in Andrew’s final semester. Consequently, plaintiff was forced to *460borrow money to cover Andrew’s tuition so that he could graduate. She also paid Andrew’s school-related expenses of approximately $4,500. (2) Defendant, in a written agreement entered into in 1985, agreed to pay $6,000 a year toward Andrew’s college expenses in return for which plaintiff waived her right to petition the circuit court "for an increase in child support, above the current level of $75 per child, per week.” He paid $4,400 in 1986; $4,165 in 1987 and nothing thereafter. (3) Defendant, in December, 1986, cut off payment to the psychiatrist to whom Jason had been referred even though those fees were covered by insurance provided through his professional corporation. He also refused to communicate with the psychiatrist.
In the autumn of 1986, plaintiff filed a petition seeking an increase in defendant’s child support obligation, an extension of defendant’s alimony obligation and reimbursement for expenses incurred and paid as a result of Andrew’s high school and college education. A three-day hearing on plaintiff’s petition took place in April and May, 1987. On September 18, 1987, the circuit court entered an order increasing defendant’s child support obligation to $110 per week per child until each child reached the age of eighteen or graduated from high school, whichever was later. This increase was made retroactive to February 13, 1987. The circuit court also extended defendant’s alimony obligation of $150 per week which was due to expire on October 1, 1987, to the date of Jason’s eighteenth birthday, August 14, 1994. The circuit court, however, denied plaintiff’s request for enforcement of the oral and written post-divorce agreements between plaintiff and defendant regarding payments for Andrew’s education. This appeal and cross appeal followed.
Defendant first argues that the circuit court *461abused its discretion in extending his alimony obligation. A circuit court has the authority to extend the period during which one former spouse is obligated to pay alimony to the other former spouse. This authority is found in MCL 552.28; MSA 25.106, which provides:
After a judgment for alimony or other allowance, for either party and children, or any of them, and also after a judgment for the appointment of trustees, to receive and hold any property for the use of either party or children as before provided the court may, from time to time, on the petition of either of the parties, revise and alter such judgment, respecting the amount of such alimony or allowance and the payment thereof, and also respecting the appropriation and payment of the principal and income of the property so held in trust, and may make any judgment respecting any of the matters which such court might have made in the original suit. [Emphasis added.]
The circuit court did not abuse its discretion in extending defendant’s alimony obligation.
Modification of alimony is authorized by MCL 552.28; MSA 25.106. Before modification may be undertaken, the party seeking modification must show a change in circumstances arising since the entry of the divorce judgment. Crouse v Crouse, 140 Mich App 234, 239; 363 NW2d 461 (1985). This Court reviews the modification of an alimony award de novo, but gives "grave consideration” to the findings made by the trial court. We will not afford appellate relief unless we are convinced that we would have reached a different conclusion if we had sat in the trial court’s place. Vance v Vance, 159 Mich App 381, 387; 406 NW2d 497 (1987), lv den 429 Mich 870 (1987); Rapaport v Rapaport, 158 *462Mich App 741, 746; 405 NW2d 165 (1987), modified 429 Mich 876 (1987).
We find that plaintiff established sufficient changes in circumstances to warrant an extension of the alimony. Plaintiff’s expenses have risen considerably. The loss of her home because she could not afford the upkeep and the high cost of repairs and maintenance of the replacement home is one such change in circumstances. Other changes not contemplated were the legal expenses she has incurred in attempts to enforce the judgment of the court and to get assistance from the husband in caring for his children and the failure of defendant to fulfil his promises of assistance. Also, the seriousness of Jason’s brain damage, which requires special care and constant attendance by plaintiff, or someone she would hire, is an unforeseen circumstance which has left plaintiff without funds and the court with justification to extend the period of alimony.
On appeal, defendant argues that it was an abuse of discretion for the circuit court to extend his alimony obligation beyond the five years provided in the divorce judgment because his salary has remained relatively constant while plaintiff’s income has increased. Defendant’s argument is spurious. While plaintiff’s income has increased, it remains significantly lower than defendant’s income. Moreover, an ex-wife’s own efforts at earning income do not release the ex-husband from his alimony obligations. Hensinger v Hensinger, 334 Mich 344, 346; 54 NW2d 610 (1952). We also note that defendant sets his own salary and that the amount of salary received by defendant from his professional corporation reflects his ability to pay the alimony increase.
Defendant next argues that the circuit court abused its discretion when it increased his child *463support obligation of $75 per week per minor child to $110 per week per minor child. A circuit court has the statutory power to modify orders for child support upon a showing by the petitioning party of a change in circumstances sufficient to justify a modification. MCL 552.17; MSA 25.97; Jacobs v Jacobs, 118 Mich App 16, 20; 324 NW2d 519 (1982). We review a circuit court’s decision to modify a child support obligation de novo. Haefner v Bayman, 165 Mich App 437, 444; 419 NW2d 29 (1988). The party challenging the modification on appeal bears the burden of showing a clear abuse of discretion which convinces this Court that it would have reached a different result. Wilkins v Wilkins, 149 Mich App 779, 792; 386 NW2d 677 (1986) .
Defendant has not shown a clear abuse of discretion. Based on the increased cost associated with the rearing of his minor children, especially the increased cost resulting from Jason’s special needs, plaintiff established a change in circumstances sufficient to warrant an upward modification of defendant’s child support obligation.
On appeal, defendant again argues that the consistency of his income level as compared with the rise in plaintiff’s income level should preclude the circuit court from modifying his support obligation. Again we find this argument spurious. The parties’ income levels are relevant only as to a determination of each party’s ability to pay. Hoke v Hoke, 162 Mich App 201, 206; 412 NW2d 694 (1987). Defendant’s income level demonstrates his ability to pay support as modified.
It is interesting to note that at the time of the entry of the divorce judgment defendant paid $195 a week in child support. Under the September 18, 1987, order for modification, defendant was to pay a total of $220 per week for two children, a modest *464increase of $25 a week over the original support award. As of March, 1989, defendant was obligated to pay only $110 per week.
In her cross appeal, plaintiff first asks us to reverse the circuit court’s decision not to enforce a stipulation in writing entered into and placed in the file in which the defendant agreed to pay $6,000 a year toward Andrew’s college expenses. Such agreements have been enforced by Michigan courts when they are made voluntarily and incorporated in the divorce judgment. Ovaitt v Ovaitt, 43 Mich App 628; 204 NW2d 753 (1972); Gibson v Gibson, 110 Mich App 666; 313 NW2d 179 (1981).
Recently, our Supreme Court in Smith v Smith, 433 Mich 606; 447 NW2d 715 (1989), held that a circuit court is without jurisdiction to provide for child support beyond the age of majority. However, we do not read Smith to preclude plaintiff from enforcing a clear contract of the parties which may be of record or in the judgment in the case.
We recognize a problem in this case in that the stipulation attempts to provide its own remedy in case of violation of the contract, namely that if defendant fails to meet the obligation which he undertook plaintiff has the right to apply for court intervention in the form of increased support. While the option of increasing child support for Andrew is no longer valid, defendant did agree to pay the college expenses in consideration of plaintiff’s agreement not to seek additional support at the time. Plaintiff kept her part of the bargain. As the Ovaitt panel concluded, failure to enforce such contracts would be "an invitation to chaos [because it] would permit parties to divorce actions to play fast and loose with the court and with the other parties ... by entering into agreements which they had no intention of performing.” Oviatt, supra at 638.
*465We therefore remand to the trial court for a hearing. The court shall consider the entry of judgment for plaintiff for that portion of the contract to pay $6,000 a year toward Andrew’s college expenses which defendant refused to perform.
As to plaintiff’s last request, we are convinced that the costs of Jason’s tutors are associated with and result from his medical condition and that they are a part of his therapy. We find such expenses reasonable and necessary for the child’s well-being. Accordingly, we remand the instant action to the circuit court to permit it to enter an order modifying the child support provision to include a provision requiring defendant to pay that portion of Jason’s tutoring expenses as the court shall find reasonable. To this extent, we reverse the circuit court.
Affirmed in part, reversed in part, and remanded. We do not retain jurisdiction.
The support was increased to $75 per minor child as of August 12, 1985. At that time, defendant’s support obligation as regards to Andrew had terminated, Andrew having reached the age of eighteen.