stepSister-in-Law was asking for it

Your step-sister in law comes to visit for the weekend and you and your wife takes her out for the night. When you get back, Anna starts telling your wife that she wishes you were not there. She is really disrespectful and won't stop being a complete bitch. Your wife goes to bed and you try to get to know her, but Anna tells you she wants nothing to do with you and plans to split you and your wife up.
She goes to bed, fuming with rage, you follow her and barge in whilst she is changing. You start to argue, calling her a bitch but seeing her standing half naked is making your cock hard. She sees this and starts to laugh, knowing she is turning you on.
You push her against the mirror and part her legs, thrusting your hands in between to feel her wet pussy. You throw her down on the bed, she tries to stop you and you take your big cock out. You take her head, push it down firmly on your cock, making her gag on the size of it.
She tries to stop, you take her hands tie them up and stuff her panties in her mouth. You bend her over and thrust into her. She squeals out as its so big. Convincing you to untie her hands she agrees to ride you cock. She is very worried you will get her pregnant as you are not wearing a condom, this only makes you pump into her deeper. You hand her your wife's vibrator, knowing how strong it is, she reluctantly cums all over your cock. She agrees to lie still and let you finish, only if you pull out. But you cant, you fill her up. You don't think you will be seeing your step-sister in law for a while now.