Creampie the Right StepSister

Your girlfriend’s step-sister in the kitchen cooking and thinking about how your girlfriend is neglecting you. She decides to have a little fun of her own and goes to his bedroom pretending she’s your girlfriend. You are excited your girlfriend wants to have sex with you and you don’t recognise her step-sister. She’s sexy and seductive and fucks you so good that you creampie her pussy. When she leaves, she reveals her little secret.
At the dinner table the three of you are having a conversation about what happened. You’re still in shock and the twins are having an argument. To calm your girlfriend down, you say you will fuck her and fill her pussy up. She couldn’t be more excited but she hates the fact that Sierra wants to watch. It grows on her a bit once your cock is inside her and they both dirty talk making themselves cum. When you creampie Stacy, Sierra says it’s her turn. Your girlfriend is next to you masturbating while you fuck her step-sister and she’s enjoying it until she hears you want to fill her up too. She gets upset and leaves and you shoot Sierra a load.
Later they are trying to think of a way to resolve this and you suggest a competition - who ever you creampie, is your girlfriend!
They suck you trying to get as much of your cock as they can. You fuck them missionary and then they take turns riding you. Each wants your cock now! They want you to fill them up. Can you decide who you will be fucking from now on?