Thank you for your message. We apologise that we did not answer your enquiry sooner. Your understanding is quite right. Your father-in-law’s remarriage will make his will in 1970’s automatically revoked. The only potential ground his ex-wife might want to make a claim on will be that his current will failed to make reasonable provision for her. However, as they were divorced quite some time ago, it does not appear that any of such claim will be strong. His ex-wife probably did not know that he was -remarried and had made a new will, which could be the reason she was writing.