It's your birthday and as your gift I am giving you the chance to turn your step-sister into a free use slut too! Your step-mom has been your free use slut for a while but now you will have your step-sister a free use slut too. But before she gets home, let step-mommy take care of you, let me suck your cock and fuck me until you give me a big creampie. Later that day you turn your bratty step-sister into a free use slut, you fuck and creampie her pussy before fucking and creampieing her asshole too! Aren't you a lucky boy