Cheating on Ate

Cheating on Kate

by BurroGirl18

Chapter 1

So I have a flatmate. Let's call her...Kate.

We've been friends since we were kids, and talked about moving in together ever since we knew that was an option. So as soon as we went to college, we did it - we got a little flat together, and it's just been perfect. We watch a bunch of TV together, cook for each other, we have the same standards for how clean everything should be, and we're just always *there* for each other.

Well, until she started dating.

I'm Amelia, by the way. I don't really know how to describe myself - sort of the opposite of Kate, in many ways. She's tall, I'm short. She's studying law, I'm studying visual arts. She's really close to her family, I'm not. She's blonde, I'm a brunette. She's flat-chested, I'm busty.

Really busty. Have been since puberty hit. It's a blessing in some ways, a curse in others, but I'm not complaining. I'd much rather have it than not, y'know?

And while Kate is the nicest, sweetest, loveliest girl in the world...I guess I'm the opposite.

But we'll get to that.

I'm not proud of what I did. I should get that out of the way up front. I don't even have a good excuse for why I did what I did - I'd been in a dry spell for a while, but it really goes way deeper. Doesn't there always?

I'm not too modest to admit that I'm attractive. Busty, short, dark hair, dark eyes. An ex once described me as "sultry", whatever that means. And so you'd think someone like me would be able to get laid pretty easily, right?

Yeah, no. I think a lot of guys don't want to approach me because they think they'd have no shot. If only they knew how dirty I was...

Although, if I'm being honest, even *I* didn't know how dirty I was.

Not until Kate got a boyfriend. Let's call him...Luke.

When Kate and Luke had been dating for like a month and a half, they were in their honeymoon period, so he was coming over quite often...and they're really fucking loud.

That is to say, they're really loud at fucking.

It bothered me. Maybe that makes me a bad friend or housemate or whatever, but it did. I hadn't been with anyone in so long, and I'm pretty horny in general, and then overhearing them doing it every other night...

So I'd been kind of going crazy, messaging my ex's. No, not just my ex's - a bunch of boys. Boys I didn't even like, but I knew were really into me. Just for the attention.

I didn't do anything with any of them. Probably because deep down I knew it was a bad idea, but I just couldn't stop myself toying with the idea. Toying with them.

And toying with my toys. I don't have a like, crazy huge collection, but I've got two or three favorites. And thanks to the sound of Luke and Kate every night - sometimes twice a night! - my toys got a real workout. I didn't do anything weird like time my orgasms with hers, but I'll admit I didn't need much else in the way of porn.

Just the sound of my flatmate and her boyfriend was more than enough stimulation.

So there we were. Kate and Luke with each other; me with an overactive libido, a collection of toys, and solicited dick pics from half the guys in my phone book.

And maybe that's where we would have stayed, but my flatmate's boyfriend became less and less discreet as time passed. The more time Luke spent at our place, the more comfortable he made himself. I'd bump into him in the flat, walking around in nothing but a pair of boxers, the outline of his half-erect cock clearly visible through it.

I mentioned it to Kate, and - for the first time since we started living together - we had a fight. A big one. She was like "Why the fuck were you looking at my boyfriend's cock?" and I was like "Um...sorry? Why is HE walking around half-naked with a boner?"

She was so fucking blinded by love that I was blamed for even *mentioning* it.

But after that, I was just like...fuck it. If a guest can walk around half-naked and *I* get in trouble for it, then why can't I make myself comfortable too?

So when I was in the flat, I rarely bothered putting on a bra, or pants. I'd just wear a loose top and panties, like I had when it was just Kate and I.

Part of it was because I didn't want to feel like a guest in my own home...but honestly, part of it was to fuck with Kate. I felt like this relationship had totally changed her - we'd been best friends for so many years, and now she acted like I didn't even exist. If she was going to get mad at me for glancing at her boyfriend's (impressive) cock, I was going to give him something to glance at.

Maybe she'd yell at *him* for it, but I doubted it. He probably wouldn't be stupid enough to let her know where he was looking.

And the other motivation was really just that I was so turned on all the time. I think unconsciously, I wanted to tease Luke. I wanted him to notice me, like I'd noticed him. Like I'd been unable to HELP noticing him, with the orgasms he gave Kate each night.

But I didn't admit that to myself at the time.

I tried not to be super obvious about it. You know, so it seemed natural. Like I'd just grown comfortable with him being around all the time, and didn't even see him as a guy any more, just another flatmate.

He basically was, really. You know how new couples are - he'd started to spend more and more time at the flat, even when Kate wasn't here.

At the start they'd arrange their dates ahead of time, so I'd only get to see him for a few minutes before they either went out...or went into Kate's room. I definitely HEARD him way more than I ever saw him.

But then they passed the relationship threshold or whatever, and hit the point where he'd just pop in whenever he felt like it. If Kate wasn't home, he'd just wait for her. Watch TV, or hang out in her room.

We'd occasionally chat, or watch something together, and I started getting to know him better. I found that he was actually a really cool guy. Not really the kind I'd expect Kate to date, to be honest - he wasn't a douche, but he was definitely...douche-adjacent. Not exactly a meathead, but she was obviously smarter than him.

I don't want to make him out as a jerk or anything. He even apologized to me. Completely unprompted - he just acknowledged that it must have been really tough for me, having a guy in my space all the time. Kate had never done that. If she'd said sorry just *once*, I would have accepted it. I understand being in love and how it changes you, how it makes you just want to spend every second with the guy...but instead, she'd blamed *me* for just wanting to have a bit of privacy.

Anyway, Luke was super nice about it. I told him it was okay, of course. I was totally honest with him - I said that at first it had been weird to have a stranger around all the time, but he was like family at this point and shouldn't worry about it.

Then he asked - out of nowhere - whether they were too loud. God, I swear I went bright red. I've never blushed so hard in my life. I nervously laughed and told him that I couldn't even hear them, but it was so obviously a lie, he immediately saw through it. Through me.

"Sorry," he said with a smile. "I can't control her."

I laughed again, but before I could change the topic, he continued.

"Was she always that loud? Like, with her other boyfriends?"

I felt sooooo uncomfortable talking about that stuff, but I eventually admitted that no, even though she'd never been the quiet type, she'd never been *this* loud with the other guys.

"That's good to hear," he said with a grin. "Not for you, of course. You must find it all really annoying."

Still blushing, I told him that I'd gotten used to it. He said if I ever brought a guy home and felt like making myself heard in the bedroom, I shouldn't hold back.

Honestly, that made me laugh way harder than it should have. Then there was a bit of an awkward pause, but he broke it by apologizing again - "Sorry if I was being inappropriate with that joke," or something like that.

I told him it was okay and we went back to more innocent subjects. I mean, mostly innocent - occasionally when we were talking, it felt a little like he was flirting with me. And I liked the attention.

Like I said, it had been a while. And Luke was hot.

Sooooo I might have flirted back, just a tiny bit. Every once in a while.

Like, he randomly mentioned one time that my legs were really beautiful. Another time, out of the blue, he complimented my flat stomach while I was wearing a crop top. My mind sort of blanked, and I replied - out of reflex - that he shouldn't feel bad about his own abs either.

He pulled up his shirt, flexing his abs. "What? These? Well, I won't complain - Kate has been giving me a good workout routine," he laughed.

I was like "Seriously?" but I couldn't stop staring at his exposed muscles.

Luke wasn't really my type. I've never been into gym bunnies, but damn...I feel like that kind of body is everyone's type, you know?

A little after that talk on the couch, Kate finally apologized too. I could tell that Luke had basically talked her into it, but it still really helped. She was way nicer afterwards, so I didn't mind if it had originally come from him - we even started hanging out more together, all three of us, watching Netflix or playing board games and drinking.

Kate would occasionally bring up the fact that I was a third wheel. Not in a mean way, or like she felt sorry for me. Well, I think she felt a little sorry for me, but it wasn't like that. It was more like she was trying to help. She told me I should find someone so we could have real double dates, and pushed for Luke to introduce one of his friends to me, Sam.

Sam was a nice guy - way more my usual type than Luke - but as soon as I met him, I couldn't help but notice he was a bit of a dork. We had a few forced double dates, but there was no spark. I'd look at Sam, then look across the table at Luke and Kate - even in public, fully clothed, even when we were all together, they were *electric*.

I liked Sam, but I wanted something more like that. I didn't just want to settle, y'know?

One time we were left alone and he tried to kiss me. He was a total gentleman about it though, when I told him he wasn't my type. He was very understanding. We called it a night then and there.

That was the last of the double dates.

Meanwhile, Luke would still give me looks and comments from time to time. Stuff that was borderline inappropriate - I felt awful about it, but I couldn't control myself. More often than not, I ended up teasing him back. Teasing him more. Pushing things further and further, all while trying to, you know, not be found out by Kate.

One time when I knew Kate was working late and Luke would be over, I don't know, I wore this thin white top without a bra. You could see my dark nipples through the material, if you looked closely enough.

Luke looked very closely. He couldn't take his eyes off me.

He tried not to be super obvious about it, but I knew exactly where he was looking. And I might have...leaned over a little too much once or twice. "Accidentally", of course.

I just couldn't stop myself. It was soooo wrong, but it turned me on so much. There was just something *about* Luke. He got me so worked up. And then Kate would come home and they'd fuck, and it would be so loud, and it was so easy to imagine myself in there, under Luke's body, or wonder if he was thinking of me while he fucked my flatmate...

So after a few hours of teasing him in my revealing white top (and getting myself very wet in the process) I went to my room to change, before Kate got back.

And I couldn't help but start touching myself. I tried to be quiet...at first. I mean, masturbation is famously a solo activity, and I think everyone is quiet when they first learn about it. You don't want your family hearing what you're up to.

But a little voice in the back of my head kept egging me on, convincing me that I should be just a tiny bit louder, just so that he could accidentally overhear. Nothing too loud, nothing suspicious.

Just 'not hold back', y'know?

Maybe I moaned too loud. I'm not sure. But I got off at the thought of Luke hearing me, of how hard he must be, how turned on he was by the sight of my tits in the white top, at the idea of him hearing the sound of my self-pleasure. As I came, I imagined Luke fucking Kate later that night, picturing me, wishing it was my body under his...

When I was done, I felt bad. This was my flatmate's boyfriend - he was completely, completely off-limits.

Even though he *did* start it.

I got up, put on a less revealing top and when Kate got home, we watched Netflix together.

She was so tired, she actually fell asleep on Luke's chest. The two of us joked about how cute she was and how comfortable she looked. That was definitely something we had in common - we both loved Kate.

Then that cocky look appeared back on Luke's face, and he said there was space next to her if I wanted to join.

God damn it. Despite having just gotten off a few hours earlier, I could feel this erotic thrill going through my body. I couldn't help but imagine what Kate would think if she opened her eyes to find me there, sharing her boyfriend's chest as we watched the movie.

Sharing her boyfriend's body.

I didn't, of course. I just laughed nervously, and went back to watching the flick.

Kate woke up at the next explosion and said she was going to bed. Luke told her he'd join once the film ended, and the two of us were left alone.

Fuck.

I felt so uncomfortable. Luke must have noticed me shifting in place and thought I was trying to find a comfortable position, because he said "You can put your head here now, it's all yours," and patted his chest.

And I...I don't know what happened, but I agreed. I curled up next to him, placed my head on his chest, and wrapped one arm around him.

I should have just stayed on the other side of the couch, where it was safe, but I just couldn't resist. There was just something about him that I couldn't say no to.

Plus, I have to admit, I wanted to be there. I wanted to be held by him, held by the strong arms that I'd seen so much of. I could smell his sweat. I could hear his heartbeat. Just for a moment, I felt like I was his, and he was mine.

He placed his arm around and stroked my hair. "There there," he said. "Much more comfortable, isn't it?"

But I could feel his heart beating fast, and could tell that he was much more excited than his calm voice let on.

"I could get used to this," I replied in an affectionate whisper. Maybe too affectionate.

"Oh yeah?"

"Yeah," I said, then tried to laugh it off. "I need a boyfriend, badly."

"Should I call Sam?" he asked jokingly.

"No, thank you," I smiled. "That won't be necessary."

"I get it," he replied. "You're way out of his league anyway."

"Ummm, thanks?" I blushed.

He resumed stroking my hair. "Yeah, you need someone much stronger. Someone who can take good care of you, and protect you."

"All those guys are taken," I whispered.

"Yeah," he said, then asked "Who said you couldn't take them from their girlfriend?"

And I just...froze. He wasn't even trying to hide it any more - he was being so blatant that I couldn't lie to myself about what was happening.

What the fuck was I doing? Cuddling with my flatmate's boyfriend, while he hinted that I should seduce him? I should have sat up, slapped him, and then marched into Kate's room to tell her what he'd just said to me.

Of course, she'd probably take his side. Accuse me of teasing him, of leading him on.

And...well, yeah. I had no idea what I could possibly say to that.

So I just lay there, my head on his chest, and continued letting him stroke my hair.

I eventually gathered my thoughts and collected my strength and said "I don't think that's a good idea."

"Probably not," he replied, removing his hand from my hair. Then he paused. "...but it's still tempting to think about, sometimes."

I looked up at him. "We'd be stupid to give into every little temptation, wouldn't we?"

He looked me in the eyes and whispered. "Define little."

When I turned my head back around, I saw that he was hard. He was wearing pants, but loose ones, and the outline of his cock was clearly visible.

And like I said, I'd worked out earlier that he was far from little.

At this point, my heart was racing and I was like, freaking out inside, but I was trying to keep my cool - or at least fake it. I tried to joke it off by saying "I can't see the TV because of you."

He grabbed my hand and placed it on his erection, pushing it down. "Keep it down then, will you?'

I could feel his throbbing penis through his pants, in my hand. I'd seen it before, like this - through his pants, and through his boxers, and in my head a thousand times...

And I was shocked and I didn't know what to do, but I didn't pull my hand away. I was just like...do I want this?

Kate was sleeping in her room just a few feet away and I was touching her boyfriend's penis.

I was touching Luke's cock. This was really happening. It was no longer just a fantasy. I was actually doing something - something awful - and I was so fucking turned on by it.

Luke saw that I wasn't protesting and the next minute slid his hand under my shirt, cupping my breast. I had changed tops, but I still wasn't wearing a bra. He whispered into my ear: "How long has it been since you've been touched like this?"

My skin was tingling all over and I was having trouble breathing and at this point I was REALLY hoping that Kate wouldn't wake up and check on us.

I should have stopped him, of course, but the thought honestly never occurred to me. The idea of pushing his hand away, or taking my hand off his cock...it just wasn't an option. I wanted him so much, and it was clear - on every level - that he wanted me, despite how wrong it was.

So I let him feel me up, and whisper "Pretty long", biting my lip, massaging his cock through his shorts.

I'm not a perfect person. I've cheated on boyfriends before, while I was really drunk, and I've always felt so ashamed about it. And I swear, I've never done something like *this* before.

God it felt good.

His cock in my hand, the way he was stroking my breasts - it all just felt so RIGHT. It was so easy to let him, so easy to pretend that this wasn't my friend's boyfriend - my friend who was sleeping in the next room.

In that moment, I was just a woman and he was just a man, and we fit together like two jigsaw pieces. Every inch of me craved his touch, and it was sooooo easy to just let him touch me, and to touch him.

Anyway, he whispered into my ears something along the lines of "It should be a crime to leave a body like yours unsatisfied for so long," and I moaned back lightly as he groped and massaged my breasts.

We did that for the next five minutes or so, him playing with my tits and me stroking his cock through his pants. If he'd reached into my pants, I swear I would have cum. I wish he had - after I cum, I'm generally much more clear-headed. I would have been reminded that what we were doing was *wrong*, no matter how fucking right it felt.

I would have remembered that he didn't belong to me, and that he shouldn't have been touching me.

But he just played with my boobs, getting me more and more worked up, and I petted his cock, and wanted him.

God I wanted him.

Then the movie ended and it got really quiet.

As the credits rolled, he finally removed his hand and whispered to me "I'll see you in the morning after Kate leaves."

I told him I had a morning class and he just said "No you don't" and that was his last word.

I didn't go to university the next day.

Cheating on Kate

by BurroGirl18

Chapter 2

I'd been mad at Kate. I'm not even denying that.