[SCPX-524] I mistook her for my girlfriend and ended up cumming inside her mother! (Censored)

Thinking that she was shaking her ass more than usual, I decided to prank her and inserted my penis. Her pussy was so tight today and it felt so good that it almost melted, so I thrust into her from behind and ejaculated in no time... I was shocked to find out that it was a case of mistaken identity!? Just when I thought I was in a desperate situation where I couldn't make an excuse, my girlfriend's mother, who was turned on by the half-hearted sex and had indigestion, asked me for a second round! I never knew that having a sexy girlfriend's mother was such a good deal...