It's your birthday and as your gift I am giving you the chance to turn your sister into a free use slut too! Your mom has been your free use slut for a while but now you will have your sister a free use slut too. But before she gets home, let 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 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