You’re peeping on your step sis sucking on a kitchen utensil and accidentally drop something, getting you caught! She confronts you and ends up telling you that she’s just practicing for her boyfriend, because she’s never done it before. You’ve always been attracted to your sister and figured this could be your in. You offer for her to practice on a real cock, your cock. She takes some convincing but she really wants to impress her boyfriend. She takes her nice plump tits to get you hard and then starts wrapping her wet mouth around you. You end up cumming deep in her throat while she’s fingering her soaking pussy. Better keep this quiet!