The young man secretly enjoys having sex with his girlfriend's mother

Today I was invited to my girlfriend's house to play. The first time I met her mother, a woman extremely beautiful and gentle that I couldn't take my eyes off her body. When Ioka-san went to sleep, I lied to my girlfriend that I needed to use the bathroom to sneak a peek at Ioka-san's underwear. I had no idea that she knew everything. When I went to take a shower, Ioka-san came in and wanted to shower me.

Her wet body exposed almost entirely in front of me. Her soft hands quickly made my penis erect. And our secret relationship began from there. Despite knowing it was wrong, we couldn't resist sneaking around to have sex even when my girlfriend was nearby...