Mother-in-law was fucked by son-in-law. (Hanajima Mizue SPRD-1126)

My son and husband both passed away first, and I often treat my daughter and husband as my deceased son. One day, I went on a hot spring trip with the couple and got drunk. My son-in-law took me back to my room but started to grope my body. Although I felt sorry for my daughter, I wanted him to take my son's place and have sex with me until I was satisfied...