paternalism vs externalities

Consider an agreement between heterosexual spouses entered into at the time of marriage in which, the woman spouse promises to notify the male spouse of any pregnancy and/or her intention to have an abortion, unless the woman in good faith believes that such notification would subject her to a risk of psychological or physical harm. Should the law enforce such an agreement? Would a rule restricting women's contractual freedom to enter into such an agreement be based on paternalism or externality concerns