My mother-in-law and I have always gotten along well and she was a fairly well-adjusted and normal person. Everything changed when her husband died because she underwent a radical transformation. The first thing she did was to get a boob and butt job and she started wearing very provocative clothes. My boyfriend (her son) and I have always been an open bisexual couple and I confessed to him that his mother had been looking very attractive lately. He quickly took the hint because he immediately realized that I really wanted to fuck her and did not put any impediment, on the contrary, in fact in the end the three of us ended up doing a threesome.