The Sister, Part Seventeen [M19/F18] [Cheating] [Erotic Couplings]

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**Part Seventeen**

Natalie was right.

She was easily one of the best fucks I’ve ever had, and definitely better than her sister. Only from a sexual perspective, however. There were a lot of reasons that I was dating Jessica, and it didn’t matter that she was a little less adventurous in the bedroom. I certainly wouldn’t choose the smug, arrogant brat that was currently straddling me over my girlfriend, although apparently I would fool around with her if she stripped down and threw herself at me.

As if the clarity of release wasn’t enough, Jessica’s voice snapped me back to thinking about just how bad this whole situation was. “Hello? Anyone?”

Clearly I was the only one freaking out. Natalie’s smirk hadn’t faded, nor was she making any efforts to dismount me. “You’re mine this weekend, yeah?” she murmured. Without waiting for an answer, she lunged forward and locked lips with me for a few seconds.

I kissed her back out of reflex for a moment, before coming to my senses and pulling away. “Natalie!” I hissed. What was she doing?! I had to get dressed, and she had to *hide*. Actually, no. I couldn’t even let Jessica into the room, at least not until the air cleared from what Natalie and I had just done. Maybe I could claim that I had just gotten myself off, but even that was a pretty big risk. My girlfriend had a decent nose, and she could also read me pretty well. The only way to keep this from her was to avoid any feasible source of suspicion.

What I *really* needed was a couple minutes alone to process everything that I just did with her sister, and to breathe in general. Until I could do that, however, I would need to pretend that everything was typical.

The issue was, I was literally still inside Natalie. And she was like a fucking koala, thoroughly wrapped around me and staying close enough so her nose was nudging mine. “I’ll leave when you tell me you love me,” she murmured.

Was she serious? If it were any other circumstance, I would have balked at her teasing request. Instead, I instantly blurted out the words. “Fine. I love you. Now, go!” We both knew that I didn’t mean it; she was just being a brat.

“Like you mean it, babe,” she giggled, before dictating, “I *love* you, Natalie.”

Of all the- Jessica could be here any SECOND. Suddenly way more annoyed with the girl than I was hot for her, I met her gaze and echoed the phrase with as much false meaning as I could muster. “I love you, Natalie. And you’re better than your sister.” While I felt a little guilty about saying the second half unprompted, especially in a more intimate tone, I was trying to get ahead of whatever games she would potentially try while I was far more desperate and rushed than she seemed to be.

In response, she gave me one more lingering peck. “Good boy,” she whispered. Then, *finally*, she quickly yet gracefully lifted herself enough to detach from me and placed her feet back on the floor. The entire time, she maintained eye contact and kept up the idle smirk. “Next chance you get, you’re going to whisper that in my ear. That is, if you don’t want to get in trouble with my dear sister. You know, the one I’m better than?” she winked.

I didn’t know what to say. Despite everything, I still found myself caught up in her sultry confidence. Probably because she was still fully nude, which offset the immature and over the top advances.

Natalie dropped the act a little bit as she stepped back. “Tell Jessica I forgot something in the car. And you’re a little flushed because the AC hasn’t kicked in. And . . . ” her eyes flitted down to check me out, before she glanced back up with a sly smile, “You should probably put your suit on.” With that, she made short work of grabbing her bikini and sauntering over to the window. Rather than hiding, she opened what I realized was gonna be her escape route. Before climbing out, the young vixen gave me one last look over her shoulder. “Don’t forget, babe. You still have one more hole to fuck.” Natalie gave her bare ass an emphatic slap, then started working her way onto the roof without making any effort to protect her modesty down there.

I absolutely fell for it. The shameless offer, paired with the way she splayed herself to get one leg at a time through the window, and I couldn’t help the mental image of what it might be like to take her like that. Speaking of being the ‘better sister,’ that was one frontier I was pretty sure Jessica and I would never explore unless she had a dramatic change of heart about it.

After a couple seconds of staring, it hit me that there were a lot more pressing things to worry about. Racing over to my swimsuit that Natalie had retrieved from my suitcase before deciding that she should be involved in undressing me and everything that it led to, I nearly tripped in my haste to shove my first leg through the mesh. Slowing down just enough to be more feasible, I pulled the suit on without bothering to waste time with the strings. Instead, I went right for the bedroom door.

Pausing just long enough to take a quiet exhale to compose myself, I opened the door and stepped out into the hall. Just in fucking time, too. Jessica had just made it to the top of the stairs, meaning I wouldn’t have to go out of my way to keep her out of my room. Also, I was suddenly so grateful that we had separate bedrooms. We obviously planned on sharing a bed for the next couple days, but she had suggested unpacking as if we each were taking our own room for the sake of feigning innocence around her sister and her parents. Apparently, setting ourselves up to be ‘family friendly’ for the break came with the unexpected perk of all of Jessica’s things being in a different bedroom than mine. While she was probably just coming to discover me at the moment, I didn’t have to stress about the possibility of how this might play out if she had forgotten something of hers.

Great. Now I was thinking in terms of methods I wouldn’t get caught.

While I wanted to purely blame Natalie, I couldn’t deny that my own stupid lust was part of the issue. Even if she was the one who coaxed it out of me, it’s not like I could say ‘it wasn’t my fault’ when I had willingly fucked the girl.

Did I regret it? Absolutely.

Would I do it again? Now that I was face to face with Jessica, the answer was clearly ‘no.’ While I couldn’t deny that I enjoyed Natalie in the heat of the moment, I needed to discover a way to cut things off with her before she was able to cloud my judgment again with her aggressive flirting and overt temptations. Easier said than done, considering how the image of her bare backside was still at the forefront of my mind.

And, since Natalie was like a mini Jessica, that meant that my girlfriend was a taller and more endowed version of Natalie.

If I wasn’t careful, each sister was gonna remind me of the other.

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NSFW: yes

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