My stepmother is an old-fashioned woman, a Showa-era mother who serves and obeys her husband. However, when my father-in-law passed away and we ended up living with us, her old habits didn't change, and she always treated both me and my wife kindly. While saying she did the same for my late father-in-law, she put socks on me and took away the rice grains from around my mouth, and my stepmother took care of me. On a day when my wife was late coming home, my stepmother cleaned my ears. I was excited by her soft thighs and good smell, so I tried stroking my stepmother's legs. Then my stepmother smiled and said that my father-in-law used to touch them the same way. I tried to embarrass my stepmother by saying that my crotch got bigger because of my stepmother. Then my stepmother, blushing, said "I'm sorry, it's my fault" and asked what I should do. When I said I wanted to feel good, she started handling my thing slowly with awkward hands...