The day my girlfriend went on a trip, I went to her house to pick up something she had forgotten and met her super glamorous older sister. When my girlfriend's older sister got out of the bath, I couldn't resist seeing her big tits, so I forced myself to have sex with her. From then on, the older sister's sexual desire was also ignited, as she started having titty fucks after eating, inserting herself after taking a bath, inserting herself again even when we were sleeping together, and already being intimate and erotic.