your sister knows all about your mother & yours secret relationship! She happens to be very curious herself, asking your mother all about your cock. Your sister begs mom to let her play with you- but mom is not quite sure she could handle it! Mom finally says that they'll see what you have to say about it. You walk in the room, your sister is more shy than usual. Your mother does most of the talking, explaining how insanely curious your sister is about your cock. Mom convinces your sister to take out her tits for you to gawk out, then both have you take out your cock. Next thing you know both your sister AND your mother have their big tits out, egging you on to cum on your sister's tits for the first time. (Starring Molly Silver!)