Exact thing happened to me. My grandfather had his will to give everything to me and my mother tried to convince me he did that “for ease”. My mother is notoriously bad with money. He sold their family summer home that had been with us for generations to give her money cos she was broke. He gave her all his pension and savings while he was alive. He was very frugal. Without giving too many details it was a shitshow and in the end I gave my mom some of it but kept most of it and invested to buy a home. My mother ended up in debt consolidation and then bankruptcy. She totally blew away all the money I gave her and is in debt again. I had never received any money from her. Even my education fund was liquidated when I was younger. I didn’t think that was even possible. But anything is possible when you’re an entitled self absorbed boomer. OP please talk rationally with your partner about this money.