I've got the wrong sister
This lucky guy has a sexy girlfriend; she has spectacular breasts, beautiful curves, and a pretty juicy ass. The only bad thing is that his partner doesn't have much of a sex drive and wants to fuck all the time. Yesterday, something very unusual happened to him because when he got home, his wife threw herself at him, pulled down his pants, and started sucking his dick. He was surprised because this isn't typical behavior for his wife. When he was fucking her, he realized he wasn't putting his dick in his wife's pussy; he was putting it in his twin sister's pussy. She's a slut, and all she wants is to have an orgasm, but he pretended not to notice and enjoyed every penetration with his sister-in-law.