She likes them

When Miryam gets off your dick, the extra weight of her horns makes itself known. She suddenly tips her head to one side and quickly corrects it again.
“Wow, my head feels heavier all of the sudden.” The horned nun says.
Before you can say anything, Miryam brings a hand to her head. When her fingers touch her horn, the expression on her eyes and lips suddenly changes. First to confusion and then, when she discovers the bony object she is touching is coming out of her own head, to worry. Her other hand feels for another horn on the other side and finds one too. Then Miriam jumps up and runs to one of the mirrors. The glass object shows her a reflection of her head and chest, letting her discover her newly darkened eyelids, blackened lips and curved horns.
“I may have been responsible for a few changes.” You awkwardly admit to Miryam.
“I …” Miryam says as she turns her head in profile to better study her new horns. “… I like it. It’s like I have permanent make-up on. No need to wash it off in the evening. Or put it back on in the morning. No chance at it running out. And the horns are rather neat. It all makes me look … bad.” Miryam smiles while she proudly caresses her horns.
You get up and gather Miryam’s clothes.
Then you walk up to the vain nun and say, “I’m glad you like it.” While handing her back her clothes.
She looks at her clothes, then looks at you and says, “I’m not a nun anymore.”
“So?” You ask with a shrug. “Or are you gona prance around this place in the nude?”
“Hmm, good point.” Miryam replies, and accepts her clothes.

As you start putting your clothes back on, you ask Miryam how she’s going to tell the other nuns about her change.
The redhead shrugs and says, “I’ll tell them at dinner.”
She then puts her feet into her panties and pulls them up.
“So now that you’re not a nun anymore. What are you going to do?” You ask in between putting on your underwear and your pants.
“First, I’ll go find me a couple of guy friends.” Miryam says as she picks up her bra. “You know, people that can help me get more experienced in sex. If they can get past my new looks, that is. After that, I’ll try and have one of them get me pregnant. Maybe I can still become a mother someday.”
She the tries putting on her habit. Now a lot more difficult with her horns. When you finish putting on your shirt, she is still struggling so you decide to help her out.
“If you like, I can always summon you a demon boyfriend.” You say as her head pop up through her clothing.
Miryam raises her eyebrows and asks, “You can?”
“I’ll lend you a demon compendium. That way you can pick out any type of demon you like the most.” You suggest. “Then I’ll sift through all the demons of your chosen type until I find one who is interested in getting together with a human woman.”
“Neat.” Miryam says. “Yeah, let’s do that.”
Before heading out, she grabs the veil and tries putting it on. Again, her horns are getting in the way, making it difficult to get the headdress properly on her head. It is even more difficult to get her hair in there. Eventually she gives up on getting her hair inside the headwear and lets it hang loose.

As Miryam finishes dressing you feel your phone vibrate. You quickly pick it up and check the message you received.
Talith: Saw how you gave that nun slut a good ploughing. Congratulations! Awesome job on growing her some horns too. Totally made me cum.
You smirk. Of course Talith masturbated while watching you and Miryam fuck on the security camera's.
You then type in a message and send it to the pink succubus.
John: Grab my demon compendium, summoning circle tools and meet me at the cloister. We’ve got work to do.

The cloister is an open-air garden in the middle of the nunnery. It is surrounded by half open halls which then lead into the building. These halls connect to several rooms, all of which you had cleared out. You didn’t know what these rooms were used for, and you didn’t care. You’ll be finding new uses for them. Maybe one of them can be used as a second shower for the men. At any rate, one of these rooms is definitely going to be used for summoning. Not the simple summoning you can do in your bedroom for emergencies, but true summoning.
You and Miryam wait at the cloister until Talith arrives carrying a backpack, a large book and is wearing a nun’s habit of her own. To be fair, she found herself a sexy black cocktail dress with a boob-window on her chest to flaunt her cleavage and a split at her hips to expose her sexy legs. Then she added a veil over her head, keeping most but not all of her blonde hair tucked away while her black horns remain exposed. All in all, the outfit is very tight-fitting leaves few of her curves to the imagination. In fact, you notice Talith is not wearing a bra underneath because her nipples are nearly poking through the fabric of her dress.
“Alright. I’m here.” Talith tells you.
When Miryam sees Talith she is surprised at her audaciousness and asks, “What are you wearing?”
Talith then looks over at Miryam and says, “Miryam, is that you? Oh, wow. I hardly recognized you. Congratulations on the horns. They make you look sexy.”
Miryam blushes and looks away while awkwardly thanking Talith for her compliment. Then the three of you enter one of the cleared rooms.

You tell Talith to hand the compendium to the former nun. Then you explain to Miryam it is a book you made yourself. Long ago, when you first started summoning demons. Back then, one of your habits was to make a few pictures of each demon you summoned. You then had a chat with the demon and learned as much about his or her type as you could and wrote it all down. Eventually you had so many pages and pictures that you decided to write it all down into a book. You started by putting in all the lesser demons in alphabetical order, separating each type in male and female. Then you did the same for all the greater demons. When you got to the higher demons however, you had to rely on descriptions and sketches from others. You had heard plenty a story about a demonologist displeasing the high demon he summoned and it backfiring on him. You had no interest in taking such an unnecessary risk. It was only during the war, when you needed a capable lieutenant that you summoned a high demon. Sariel, the she-devil. Because of this, only the high demon page for she-devils has any pictures. All of which are Sariel's.

As Miryam starts flipping through the pages for potential dates, you and Talith start making the summoning circle. The two of you start by measuring the room so you can calculate its exact center. Once you got that you use it as a basis for a pentagram. One which is big enough for a large demon to fit inside. You also make certain to draw it in bright red paint. Once the pentagram is finished you draw extra lines between the five points so the pentagram becomes enclosed inside a pentagon. After that you and Talith extend the sides of the pentagon and create a much larger upside-down pentagram around the first one, which nearly takes up the entire room. This one you then draw a circle around, enclosing it as well.
That was the hardest part. If your calculations were just a little bit off, you’d need to start over. Either by removing all the paint or moving to a different room. Luckily, the war required for both you and Talith to draw many summoning circles like this. Making both of you proficient at it.

Suddenly Miryam interrupts and says, “Hey, Talith. The succubus in this book looks a lot like you. Is she like a sister of yours?”
Talith, being one of the people that helped you write that book, knows what Miryam is talking about and says, “Oh, no. That’s me.”
Miryam checks the pictures in the book again and says, “But this ones horns are smaller than yours.”
“I know.” Talith replies. “Those pictures were taken like 17 years ago. My horns have grown a bit since then.”
“Seventeen?” Miryam asks surprised. “But … you look like eighteen in these pictures. And now you look like you’re only in your early twenties.”
“Yes, I know.” The pink succubus says as plays with some of her blonde hair that comes out of her veil. “Demons age very slowly compared to humans, and most of us eventually even stop growing older and live forever.”
Surprised again, Miryam quickly touches the tip of one of her horns and asks, “You mean, if I’m a demon now, I could live forever too?”
“Sorry, Miryam.” You answer. “But you are neither a demon like Talith nor a half-demon like me. You are more like a human with demonic traits. At best, you’ll age slower, keep your youthful looks longer, but eventually old age will still catch up with you.”
“So, what? I’ll live up to like 150 now?” Miryam asks.
“More like up to 200 I think.” You continue explaining. “And only become a senior in the latter 30 years. So, you’ll spend like … about 50 years in your twenties, another 50 in your thirties and 50 more in your forties.”
When hearing this Miryam’s eyes widen in surprise and her mouth opens wide enough for you to slide your dick inside.
“By the gods …” Miryam says. “You mean I got a life extension just by having sex with you?”
“Oh? You had sex with him?” Talith says, pretending to not be aware of what she saw through the camera’s earlier.
“Oh shit.” Miryam replies and quickly buries her face in the demon compendium to hide her blushing from shear embarrassment.
“No need to be ashamed of it.” Talith continues. “You had a good time. You should be proud for enjoying yourself.”
“Yeah, and don’t be a stranger.” You add on. “If you want another ride from me, feel free to come back for more.”
Rather than put the book down, Miryam hides her face even more.
“One more question, Talith.” Miryam says from behind the book. “Did John **** you to pose nude for these pictures.”
Talith explains, “Demons come into your world just nude as human babies do.” Then she grins and continues, “But if I had clothes on, I would insist on taking them off and pose in the nude.
Miryam mumbled something from behind the book, but neither you nor Talith could make out what it was.

You then continue with completing the summoning circle. You wrote a long demonic text on the outside of the circle that encompasses the entire symbol. Talith instead paints some large singular emblems inside the circle and its pentagrams. When all that is done, the summoning circle is finally complete.
“Whew, all done.” You sigh.
Then you turn to the former nun and ask, “Well, Miryam? Did you find something you like?”
“Yeah, I did.” Miryam says.
The redhead then stands up and walks over to you with the book.
“This is the kind of boyfriend I would like.” She says and shows you a page.