After my father remarries, I move in with six adult stepsisters. They look serious and respectable at school or work, but at home they use my cock as casually as breathing. Forced to suppress their libido in public, they unleash all their pent-up desire and stress on me behind closed doors. A rota is supposed to keep access to my cock organized, yet my body can barely survive the constant demands. If I do not leave soon, they may drain a lifetime's worth of cum from me.