My mother-in-law is an old-fashioned woman, a Showa-era mother who obeys and serves her husband. However, after my father-in-law passed away, she came to live with my wife and I, but she didn't let go of her old habits and was always kind to me and my wife. She took care of me, putting on my socks and removing rice grains from my mouth, saying that she had done the same for my late father-in-law. On the days when my wife came home late, my mother-in-law cleaned my ears. I was excited by her soft thighs and nice smell, so I stroked her legs. Then my mother-in-law smiled and said that my father-in-law touched me in the same way. I tried to make my mother-in-law feel uncomfortable by telling her that my crotch had grown because of her. Then, my mother-in-law said shyly that it was my fault and asked me what I should do. When I told her that I wanted her to feel good, she started to slowly stroke my thing with awkward hands...