If any person dies within three months after his marriage was dissolved by a divorce or annulment by a competent court and that person executed a will before the date of such dissolution, the previous spouse will not be entitled to inherit from the deceased estate UNLESS the will makes express provision otherwise. After the lapse of the three month period the ex spouse shall be entitled to inherit if the will of the deceased has not been amended. In the instance of parties having a joint will, the divorce will not make the will invalid and spouses will have to redraft the Will should they not want their ex spouse to inherit.