In this post-judgment matrimonial case, the trial court imposed a penalty on plaintiff, in accord with his matrimonial settlement agreement (MSA), for violating one of the MSA's terms. On appeal from the award, plaintiff invoked the contract law principle that bars, as an unenforceable penalty, liquidated damages that unreasonably exceed normally compensable contract damages. The court concludes that the contract rule against penalties does not apply with equal force to MSAs. The court emphasizes that family judges retain the authority to modify an MSA's penalty provision to assure fairness and equity. Since no modification was warranted under the facts of the case, the court affirms the penalty award.