Today I was invited by my girlfriend to the house to play. The first time I met her mother, an incredibly beautiful, gentle woman who made me unable to take my eyes off her body. By the time Ioka-san went to bed, I lied to my girlfriend about going to the bathroom to peek at Ioka-san's panties. I didn't know that she knew it all. When I went to take a bath, Ioka-san went inside and wanted to give me a bath. Her body was wet, revealing almost all of it in front of me. Her soft hand made my cock quickly stand up. And our covert relationship started from there. Even though we knew it was wrong, we couldn't help but secretly fuck each other even when our girlfriends were nearby...