Sierra's

You quickly decide that Sierra's dorm would be the most discreet place available for you to hunker down. She's generally quiet and reasonable, even if she gets manipulated by your cock she might at least not tell everyone where you are. But, there is the Brianna & Ashley situation to deal with first. Thinking on your feet, you send a quick text to Brianna:

John: Hey Brianna, I'm at Professor Pifflewhiz's office, in the basement of the Evocation building. Come on over and bring Ashley too ;)

That should solve that. Walking quickly towards the back door of the building, you then text Sierra.

John: Sure, I could stop by right now. Where's your dorm?

Sierra's response is instantaneous.

Sierra: Huebner 23B. Thanks!!!

Your cock is really excited that you're finally going to add another member to your harem!

"Nooo," you whisper to the sausage flapping between your thighs, "I'm just going to do a normal tutoring session, then I'll explain my problem and ask if she can help. Everything's gonna be totally normal."

~Sierra's POV~

She stared at her phone, surprised both that she actually asked and that it was this easy to get him to come over. What had gotten into her? She hadn't been able to tear her eyes away from that video since her friend sent it to her. She wasn't usually into porn, but something about that video seemed to transcend pornography. It looked real, somehow, even though there's no way it was. She almost slipped her hand back down to rub her pussy, but thought better of it. Her bed was drenched in sweat and her hair was a complete mess. Would John still fuck her if he found out that she'd become a compulsive masturbator in the last three hours? Probably, but she really didn't want him to see her that way.

She quickly opened the window and turned on a fan to air out her room, and set to work stripping the sheets off her bed. She had no idea when he would be there, so she had to deal with the most pressing matters first. She was nothing if not efficient. She had to settle for just changing out the sheets and throwing a bedspread on, but she finished in less than three minutes. Now it was time to get herself looking presentable.

"Hmm, what to wear," she mumbled to herself, brushing her hair and looking at her nude body in the mirror. As always, she had mixed feelings about her body. Always, she'd felt like she was somehow both too skinny and too fat. Thanks, mom. But, she tried her best to look at herself like John did sometimes, thinking about what she could do to arouse him. She even struck a few poses, trying to give herself a smoldering look.

I can't believe I'm really thinking about him this way. She'd never felt much for John, just that he was polite enough and helpful. They got along well. But something about that video had awakened a sexual fire in her that she couldn't ignore.

She could wear that white top & jean shorts combo that John had ogled her in that one time, but it wasn't exactly a fuck-me outfit. She could do better, surely. Suddenly, she had an idea. She rifled through her closet until she got to a dress she'd never worn before, a tiny blue single-strapped dress. She'd bought it right before going to college, to wear on her first date. Unfortunately, her class load was too much, and she never ended up having the time to go on any dates. The dress was tight on her and revealing, yet tasteful. I guess I could do worse than John for my first "date" ever.

She was adjusting the dress when the knock on the door came.

"Give me a second!" She gave it one last tug into place and looked at herself in the mirror one last time. Fine, I guess. FUCK I need that dick.

~John's POV~

Your penis started acting up when you were just a few steps from Sierra's dorm room, and by the time you've knocked on her door it's already starting to harden. It just wants to fuck her so badly! It KNOWS you want to too!

Yeah but-- you're interrupted when Sierra opens the door, apologizing profusely. You barely hear her, you're just enraptured by the dress she has on. It's a deep blue color, with a single broad strap on the right shoulder and the other shoulder completely bare. The neckline is not revealing, but it certainly doesn't go to great lengths to hide her modest chest. The dress hugs her slender body tightly, terminating halfway down her thigh. Your mind is flooded with images of ripping it off, pinning her to a wall, and railing her like a freight train.

A little *drip* alerts you to the fact that you've just been staring at her silently for a minute, and furthermore, she's just been staring at you for nearly as long. Or more accurately, she's been staring at your turgid cock, its head pointing aggressively up at her and leaking precum steadily.

"Uhh..."

She snaps out of it, nervously looking into your eyes and then looking away. "S-sorry! Here, come on in, ah... make yourself comfortable!" She steps back, letting you into her room. It's amazingly clean compared to most dorms you've been in, including your own.

You shuffle awkwardly in, trying not to splatter precum everywhere. Sierra stares at your cock, eyes wide with what you can only parse as terror. She turns away, though, and heads over to her desk where she has en electric kettle.

"Want some tea? I've got sencha, english breakfast, this weird spiced chai, and chamomile," she rattles off quickly.

"What's sencha?"

"Oh, it's the most common type of green tea." She doesn't turn to look at you.

"Sure, I'll have that."

"Okay! I'll just get some water from the bathroom really quick, you can have a seat on the bed." Her voice is frantic, and she still refuses to look at you as she crosses the room. When she passes by you can *smell* her arousal. You can't help but watch how the dress's thin material moves across her body.

Okay, so far so good, acting pretty normal so far. Your cock agrees, but only because it's positive the hot, sweaty rutting isn't too far away. You hear the sound of the sink being turned on from the bathroom. About fifteen seconds of calm pass.

"Are my boobs bigger?!"

Sierra returns to her dorm room, the kettle forgotten, and looks at you with a shocked expression and rosy cheeks. Her boobs are, indeed, a little bigger than they had been a moment ago. You wouldn't have been able to tell if she hadn't pointed it out, though. It looks... hot.

Yes, yes, YES!! BREED HER BREED HER BREED HER!!! Your cock practically screams at you, pulsing and somehow hardening even more.

Instead, you say, "Sierra, I think it's time we addressed the elephant in the room." You motion towards the tower of flesh sticking up from between your legs.

She stares at it, then starts to bite her lip and rub her thighs together. You press on.

"This is a demon, of the Irrumabus variety. I had a bit of an accident last night and now I'm stuck with it. For now. It seems to have the ability to alter the minds of women around me, and their bodies. That's why you're so horny, and why your boobs grew. It's trying to make you into a, I don't know, broodmare?"

Her hand fidgets with the hem of her dress. "So that's why you came here? To f-fuck a baby into me? Blow up my tits and use me like a cum dump?"

"No, no no no! I came here to lay low for a while. My dorm isn't safe, there are women there. You're the only one I felt like I could trust. I can't get anyone else pregnant."

She paws at her swelling bosom with one hand and whines softly. "How big can you make my tits?"

You think they're already at the perfect size, actually, but they were nowhere near as big as Pifflewhiz's were earlier.

"Um, a lot bigger." She starts advancing towards you, laser-focused on your cock. "What are you doing?"

She crouches down and grabs your cock, kissing it tenderly. "Make my tits huge. I don't care about getting pregnant, I can just get, like, a demonic abortion or something. I don't know how I feel about you, yet, but I NEED this cock. I need big, FAT tits, big enough to service it." She looks up at you with those big brown eyes, "Maybe we can try dating after?"