My wife's mother, still beautiful and seductive even with her age, was apparently a model in her younger days. Through her connections, she was asked to do some work as an underwear model, so she came to Tokyo and stayed at our house. Meeting my mother-in-law for the first time in a long time, she was as charming as ever. When I sneaked into my mother-in-law's room while my wife wasn't looking, I found her practicing posing in her underwear in front of the mirror. Unable to suppress my erection, my desires ran wild and I ended up cumming inside her! From that day on, I gave in to my carnal desires and had sex with my mother-in-law over and over again...