Use her pussy for the last time

"Nevermind that. Just suck my dick until I get hard again so I can fuck your pussy." you say as you sit back down on the couch. Your mind wanders as she begins suckling on your dick, and you come up with an improvement to your punishment plan. You'll need a Tinder profile for her, and some extremely slutty pictures to go along with it.

"I own the right to take some pictures of you." You pull out your phone and have her strike some poses for you as you snap some pictures of her cum covered face, with some of it having dripped down onto her boobs. Ahegao with peace sign, that kind of stuff.

Thinking about what you have planned for her as well as her expert cocksucking has got you ready to go again. You have her lay on her back, and fold her damn near in half, with her knees hooked around her upper arms by her shoulders and her feet up past her head. The position is known as Viennese Oyster or Spread Eagle, and it is optimal for maximum depth penetration. It puts her pussy and ass on full display, and allows for an excellent angle of penetration.

You align your cock, and thrust in with a single smooth motion as you fall onto her. Your ex always was seemingly perpetually wet, so you slide in easily. You are laying on top of her now, face to face, cock firmly planted in her pussy, staring into her wide eyes as you grab her around the base of her neck with both hands and begin pounding into her. Its funny how each girls body is different and requires slightly different rhythms for the optimal fuck. Each new girl requires a slight adjustment period where you figure out what works best. But you quickly find your rhythm with your ex; it's like riding the town bike. And in a way, she is. You use your grip on her neck not so much to **** her as to get leverage to control her bouncing and shove her back down towards your dick with perfect timing to maximize penetration ****. With each thrust you slam hard into her and the tip of your dick bumps into her cervix, which causes her to wince slightly, but feels great for you. If your dick was any longer it'd probably hurt you too, but as it stands its the perfect length to just rub nicely on your cock head. Despite your rough treatment, the sex maniac you're plowing into seems to still be enjoying herself. Well fine, your punishment would take care of that. You feel your orgasm approaching and tell her "cum on my cock now slut, its your last chance".

She reaches up and starts rubbing her nipples to try to get the extra stimulation to push her over the edge, but doesn't quite manage it before you bottom out deep inside her pussy and pump her full of cum.

You pull out and she says "Thanks for letting me use your pussy. Can I rub your clit until I cum?"

"No. You can't rub your clit because you don't have one"

She looks confused and quickly reaches down to find that what you said is true. Where her clit should be is just normal labia and skin, as if she had never had one.

"Fuck." She gives you a horrified look then asks "Well can I just finger fuck myself then?"

"Well you can if you like, but you don't have a vagina either. No vulva either. You're just an asshole with two assholes"

She quickly reaches down further and discovers that she does indeed only have an asshole where her pussy used to be. The perfect punishment for a cheating nymphomaniac who hates anal. You brought her right to the edge of orgasm and now she'll never cum again. The ultimate orgasm denial. Or maybe she'll learn to love being an anal only whore.

You have her pose for another picture to use in that Tinder profile you're building for her and then tell her "Now you're the perfect anal cum dump for me. Do you know why?"

"...why?" She says shakily, still reeling from the shock of having lost something so precious to her.

"Because I've got two big, fat, rock hard cocks, and they've got your name written all over them..."

You both look at your crotch in time to see a second cock sprouting out from just above your original cock... with "Karen" written on it several times. Gotta be more careful with your phrasing in the future.

"My cocks do not literally have your name written on them" you chuckle, and the writing quickly fades away.

"God fucking damn it. Please. Please don't fuck my ass"

"Oh? You hate anal do you? Maybe you should have thought of that before you cheated on me and let Ken fuck your ass, you stupid whore"

"It was a mistake, I was so horny and I wasn't on birth control so I didn't want to get pregnant and we didn't have a condom and I didn't know how much I hated it"

Her old excuses, especially the last one bring your old rage freshly to mind.