You are

You stare deeply into Jennifer’s eyes and answer, “I do.”
When Jennifer hears you say those words she smiles and says, “Well then, let’ make it happen.”
After that, you are convinced Jennifer is not going to allow your dick to leave her pussy until after you spill your sperm inside her. You leave her in control and allow her to ride you any way she likes. If she wants your child so badly, you will let her be responsible for drawing the seed from your balls.
At some point, the veil on her head come loose and falls onto the bed. Then it feels less like you’re being fucked by a nun, but by a demoness instead. No, a half demon like yourself. You know that isn’t true, that Jennifer’s past is different from yours. But when you see her black lips, the darkness around her eyes, the horns on her head … It makes your heart feel like you’ve finally found your soulmate. How wrong you were at going after Angelica. It’s not the half angel that belongs with you, it is the corrupted woman bouncing on your dick now. You don’t just want to get her pregnant, not any more. You need to get her pregnant. That is when you feel you dick start to throb.
“I’m cumming!” You warn Jennifer.
“Yes! Cum inside me!” Jennifer moans loudly while she starts grinding her pussy on your dick. “Corrupt my egg just like you corrupted me! Put your demon spawn inside my womb.”
You put your hands on Jennifer’s hip and pull her close to you. With both of you doing your best to lock your genitals together, your dick gives up its treasure and hands over your fertile sperm to Jennifer’s eager pussy.
“John! I feel you spurt!” Jennifer moans. “Oh my god! You’re making me pregnant! I’m gona be a pregnant nun!”
All of a sudden, Jennifer throws her head back and her body starts spasming. You also feel her pussy contracting around your dick, like it’s trying to milk the sperm from your dick. She won’t get much more out of you, though. Your dick might still be hard, but your orgasm is already passed. Jennifer instead keep riding you until her orgasm also passes. Jennifer then leans forward and lays her torso down on top of you. Her face is right in front of yours. Her horns touch yours and she says, “Thank you. For everything you’ve done to me.”
She kisses you one more time. Then she lies herself next to you and you both fall asleep.

The following morning you wake up first. You look over and see Jennifer sleeping in the nude. She lies on her back with her face towards you. She looks so pretty. Her cute face looks even prettier now with those darkened lips and eyes. You love how gothic it makes her seem. You reach out with your finger and gently touch her lower lip. Jennifer sleeps so deeply she doesn’t notice it. You then look at her breasts and watch them heave slightly with every breath. Sometimes, when you wake up next to Talith like this, you feel like teasing her by playing with her nipples. But if you do you get her ready to fuck you again, which for a succubus can be dangerous. But Jennifer is not a succubus.
You reach out with your hand and trace the tip of your middle finger around Jennifer’s nipple. Then you grab it with your thumb and index finger and both gently pull and pinch it. As you play with her nipple it slowly starts to harden.
Jennifer then slowly opens her eyes and says, “Mmmh, having fun.”
“I am.” You admit. “Good morning, by the way. Did you have a good sleep?”
“I did.” Jennifer says. “And it looks like now I’m going to have a good morning too.”
Jennifer rolls on her side and one of her hands goes straight to your dick. You respond by letting the hand on her boobs slide down towards her crotch. When your hand reaches her belly, she already spreads her legs for you. Then your hand goes for her pussy and you masturbate her in return.
“It’s still kinda hard to wrap my mind around it.” Jennifer moans. “Yesterday morning, I was still a prude virgin. Then I broke my vow of chastity and fucked a devil. I may even be pregnant with a demon baby. I am a disgrace of a nun.”
“Don’t think like that.” You say. “As a virgin you had denied yourself a big part of what it means to be human. You would have never known what it means to be a mother. Now that you are loose from that restraint, you are free to create new life. Besides, I’m only a half devil.”
Jennifer looks hopefully into your eyes and asks, “John … am I still a good girl?”
“No.” You say with a smirk. “You’re a naughty girl now.”
Jennifer smirks back and says, “You’re right. I’m a naughty nun.”
She then spreads her legs as wide as she can and says, “And naughty nuns are rewarded with dick, aren’t they?”
“They sure are.” You answer.
You accept Jennifer’s invitation by taking place between her legs. Then you fill her hungry womanhood with your hard meat. As soon as your dick is inside her, you feel the naughty nun wrap her legs around you. Then she starts thrusting her hips, fucking herself on your dick before you even started thrusting.
“My my. You sure are eager.” You muse as you begin your own thrusts.
“I know.” Jennifer replies. “If other nuns find out, I’m sure they will call me a disgrace.”
“Nuns other than Miryam and Siara, you mean.” You remind her as you start playing with her boobs.
“Ah yes, the other disgraced nuns.” Jennifer moans. “Will you be disgracing Angelica too?”
“If she gives me the chance.” You admit. “Why do you ask?”
“Angelica is a good friend of mine.” Jennifer says. “I don’t want her to be left out. I want her to experience this too. Join us in this pleasure. Become part of our group again.”
“Alright then.” You say. “I will double my efforts. But for now, I want to hear you moan.”
You then grab one of Jennifer’s boobs with one and shove her nipple in your mouth to such on it. Jennifer replies by giving in to her moans. It was your intention to take your time and fuck her slowly. But Jennifer instead asks you to do her faster, then harder. Before you know it, you are fucking her at a quick rough pace.
“Harder John. Harder. Do me just like Talith yesterday.” Jennifer begs you.
So, she wants it like that, huh? Good thing you saw the security footage last night.
You switch your movement to lengthy powerful thrusts. With every one of them, Jennifer grunts a little. Then you increase your speed. Jennifer’s grunts become louder and it becomes hard for her to keep her legs in place. Then you go even faster, giving this little bitch the rough fuck she’s been asking for. Jennifer becomes unable to keep her legs in place and they just start flailing. It doesn’t take long after that, but Jennifer then has her orgasm. Of course, you don’t want to let her off that easy.
After her orgasm you slow down a bit, not to grant her some rest but for yourself. Shortly after you are once again pounding her into the matrass. Fast and hard, just how she likes it. This time when she orgasms, the contractions of her pussy around your cock trigger your orgasm as well. You push your dick all the way inside her and let your dick transfer the sperm from your body into hers.
“Yes! Breed me! Breed meee!” Jennifer moans.
When you finish unloading into her you let your dick stay inside. You give her another few kisses until your dick becomes so flaccid it slips out of her. That is when you both get out of bed an get dressed.

As you put on your clothes you tell Jennifer, “In case you are in need of a fuck but I am unavailable, feel free to have sex with someone else. I won’t be upset.”
Jennifer looks at you in surprise and asks, “Are you’re saying you want other demons to breed me to?”
“No,” You explain. “I would very much prefer to be the man who gets you pregnant. But like I said, it’s your body so your decision who gets you pregnant. Besides, it’s not like I’m going to limit myself to you so, you should not limit yourself to me either.”
“I see.” Jennifer says as she puts on her habit. “I guess you’d see it that way. After all, you have a close relationship with Talith. And you also have to corrupt Angelica like you did the rest of us.”
She then picks up her veil and while putting it on she says, “Alright, I’ll experiment with some of the other demons. But for them my pussy will be off limits. That is solely for you until I am certain I am with child.”
“I’m glad you understand.” You say as you finish getting dressed.
After that Jennifer is fully dressed and leaves your room. Except after she’s gone, you notice her bra and panties are still here.
You shake your head and muse, “Naughty girl.” to yourself.