it's been a while since you fucked your wife's sister. You realize that you didn't impregnate her, she came to visit your wife and kept teasing you, she wore a provocative outfit, she was without underwear and her pussy sometimes glistened from under her skirt, she helped her sister to clean the apartment and sometimes seduced you. Your wife's sister went to clean the bathroom. the detergent ran out at home and your wife went to the store ( your sister doesn't know it yet you are alone). You go into her bathroom, you come up behind her as she is scrubbing the tub. You grab her around the waist and shove your erect cock up her ass, no warning, no lube. Your wife's sister didn't expect this, she wasn't ready, she is in pain from your cock in her ass, she whimpers and begs you to pull your cock out of her ass, it is very big and hard, it hurts her. You don't listen to her, for a while you continue to slowly and painfully stretch her ass , at some point she begs you to stop and you agree, you put her on her knees and make her clean your cock with her mouth so she can taste her asshole on your cock. She has no choice, she whimpers and licks your cock, sucks it, and begs you to cum in her mouth and not fuck her ass anymore, her ass is very sore. she sucks your cock intensely, hoping that you will cum, but you are not going to stop, you drag her by her hair into the bedroom and start to roughly destroy her pussy, you fuck her juicy pussy, she begs you to stop, but you end up cumming in her. cum drips from her pussy, she is disappointed because she forgot to take her birth control in the morning. You make her clean your cock of the remaining cum, she starts sucking and you suddenly piss in her mouth, her cheeks swell with piss and it all spills out. She is humiliated goes to clean the bathroom next, making sure your sister doesn't find out anything....