Order, Supreme Court, New York County (Phyllis Gangel-Jacob, J.), entered on or about April 14, 1993, which, inter alia, struck defendant’s affirmative defenses and counterclaims pertaining to plaintiff’s second cause of action and granted plaintiff’s motion for partial summary judgment on her second cause of action, unanimously affirmed, without costs.
Plaintiff and defendant were married in 1972 and had three daughters. In 1990, they separated and in 1991, negotiated and executed, with the aid of independent counsel, a separation agreement. Two years later, plaintiff brought this action for divorce and for maintenance, child support, and tuition arrears, further alleging that defendant had defaulted under the agreement. After joinder of issue, plaintiff moved for partial summary judgment on the cause of action for arrears. Defendant opposed on the grounds, inter alia, that the separation agreement was the product of fraud, overreaching, and that its terms were unconscionable.
The IAS Court properly granted plaintiff’s motion. Defendant, a sophisticated investment banker, entered into the separation agreement after lengthy negotiations with the aid of counsel, and then defaulted thereunder (Grubman v Grubman,
