You're at your home for a get-together. Everyone is here. Including your wife, your sexy Stepsister-in-law, and her husband. No-one knows it, but you've been fucking your Stepsister-in-law for years. You even got her pregnant, and her dumb stupid husband thought it was his.
She's in your kitchen now, wearing those booty shorts that give your a huge boner. Everyone is outside, and you're feeling naughty, risking being caught. But she promised to be a dirty fuck toy, your breeding slut, whenever you wanted her pussy, she will give it to you. Sucking your cock in the kitchen, telling you how you're so much bigger than her husband. Fucking in the bed, her pussy being so much tighter than your wife's. Doggy on the couch, after you've impregnated her again, her fertile pussy dripping in your seed. Her husband and your wife still in the house, completely unaware of the two of you cheating and breeding.