When my girlfriend, Claire, lost her job and had to move in with me, I have to admit I was excited to take our relationship to the next level. I'd never been in a relationship with someone for as long as I had with her, or a relationship with someone as attractive. I had also secretly hoped that Claire living in my apartment would help with the problems I'd been having with my roommate, David. I'd known David since college, and while he'd always been a bit of a shut-in and a little overweight, it all got worse after we graduated. David had made a small fortune in bitcoin during our college days, and now was set for life, so he spent his days at home eating, playing video games, and sleeping, and his bad habits worsened until he was a total slob. Though I couldn't really complain because he paid for more than his share of the rent, even if living with him wasn't easy; the sink was always filled with dirty dishes, the living room was littered with beer cans and pizza boxes, and the bathroom was never clean, and his bedroom stunk of sweat and old dried up cum tissues. I had hoped when Claire moved in that her type-a qualities would rub off on him and she could help me motivate him to be a better roommate, but I didn't know how wrong I had been.

I knew that living with him would be a challenge, but I never expected that his slovenly traits would start to rub off on her. It seemed that without a job to go to every day, Claire had started to become more complacent with her lot in life, sleeping in late, watching tv all day, snacking as and when she felt like it, and David only seemed to encourage her behavior. They spent all day together while I was at work just hanging out, smoking weed, eating snacks and playing video games. I figured I'd let it slide, she'd just had a really rough time getting fired from her dream job and now facing a bad job market, it was okay if she just relaxed for a bit. And relaxed she did: Claire began to let herself go, becoming lazier, not putting any effort into how she looked or what she wore, not going to the gym anymore. Her once fit and toned body was slowly showing signs of softening from all the lazy days spent with David.

What I didn't know was that my roommate was finding this change in her incredibly attractive, and was actively encouraging it. David had had a crush on Claire for years and was determined to not only make her his, but to corrupt her and turn her into his perfect woman. I didn't think anything of it at first, but then I started to notice little things that made me suspicious. They would share inside jokes that I didn't understand, they would exchange secret glances when they thought I wasn't looking, and whisper and laugh with each other in the hallway, and I could sense a strange chemistry between them.

David had been corrupting my girlfriend, turning her into a fat, lazy slob just like himself, and he was doing it for his own selfish reasons. He wanted her for himself, and he didn't care who he hurt in the process. He'd begun to steal her away, and I didn't suspect a thing.

Claire had never found David attractive before, and had actually told me in the past that he repulsed her, but now that they were spending all of this time together and she was starting to get used to the way he lived, her attitude towards him completely changed. It was strange seeing her go from being repulsed by his behavior to finding some of his more boorish traits funny or charming. I chalked it up to them becoming closer friends with all the time they were spending together, but there was more.

A few weeks back Claire had walked into David’s room to ask him if he wanted to split a pizza, and instead found him masturbating into a pair of her panties. She immediately left and ran off to our room hoping to hide from the embarrassment, but the image of what she walked in on was burned into her head. David was jerking off into a pair of her panties, and he had the biggest dick she had ever seen. She wanted to be disgusted by it, it was a total invasion of her personal belongings, but it was also the hottest thing she had ever seen. She had immediately rubbed one out herself to the memory and came harder than she ever had before. And thus, Claire’s attraction to David started to take root.

Lately I've begun to grow a little suspicious of their behavior, and so, while they were both out of the apartment I installed hidden security cameras throughout the house, in all the common spaces and bedrooms, so that I can check in on them from work and see what they're doing. It was a slow day at work, so I decided to go hide out in the bathroom for a bit and log into the spy camera app on my phone to see what Claire and David were up to at home.The two of them were sitting on the couch, some movie was playing on the tv, but they were more focused on the food in front of them. It looked like David had bought one of those sheet cakes from a grocery store, the kind you get for big birthday parties, and he and Claire were eating it. Though it would be more accurate to say he was feeding it to Claire. There was something sensual about the act that both repulsed me and turned me on. I mean it was just a piece of cake, but it was just so intimate.

David smiled at Claire as she polished off another piece of cake, "You know Claire, you're really looking good lately. You've always been hot, but with us hanging out and eating all the time you're starting to get extra curvy. It's really a good look for you."

Claire turned to look at David and blushed, when in the past she would have been offended to hear him talking about her body, "Thanks David, I guess I'll take that as a compliment. But I'm not really sure I want to be getting curvier. I mean it makes me feel good to eat what I want when I want, but I just don't know if I want to look like this."

"Well, I think you should do whatever makes you feel good, I'm not going to stop you," David said. "And besides, I doubt anyone would notice anyway. Especially not Jamie, he's always at work."

Claire sighed, "Yeah, he's almost never home these days, he's so busy with his projects that I feel like I never see him."

David chuckled, "If I had a girlfriend as hot as you I don't think I'd ever leave the bedroom, let alone go to work."

Claire looked down at her plate and felt the blush creeping across her cheeks, "That's sweet, but I'm just not sure how much longer I can keep this up. Working out every day and eating right isn't easy and my ass and thighs are getting bigger. I'm scared that one of these days I'll wake up and find myself looking like a total pig."

David reached out and placed his hand on hers, "I'd still like you no matter what you looked like."