BF711 — Four Days of Temptation by My Girlfriend's Adult Sister While She Was Away

The day my girlfriend leaves to visit her family, her adult sister shows up. When I tell her my girlfriend is not home, she asks me to be her boyfriend for the day and makes me go shopping with her. She keeps pressing her body against mine and brings her face close enough to kiss. I know accepting her advances will set everything in motion, but with those enormous breasts tempting me, I finally lose control.