Suddenly, Reiko, my mother's childhood friend, came to my house. Reiko was a beautiful woman brimming with adult charm, which made it hard to believe she was the same age as my mother. On top of that, there was something about her that seemed to have some kind of dark shadow over her, and I was instantly taken aback. Then, that night, I witnessed Reiko playing with her crotch in a sexy way by herself...