Part 39

Natalie was so fucking tight, in the best way. At the same time, she was quite adept at relaxing and opening up for me back there. I gripped her hips and pulled her towards me while simultaneously pushing forward. Slowly and gently. Not because I was worried about the young vixen, considering her confident and seductive attitude about all this; I just wanted to appreciate the experience as I explored the third hole she had taunted about for so long.

Even when I was taking her from behind, with less of a connection in terms of eye contact and what she could do with her hands, the girl knew how to actively participate anyway. She shifted her hips here and there, coaxing me further in and ensuring I stayed nice and hard for her by pressing back into me in just the right way. All the while, she let out little gasps and almost-moans as I progressed.

At this point, it took all my self control to not explode inside of her immediately. My endurance was normally pretty good, except Natalie had slipped into my room quite some time ago and had been playing her usual games since then. She could also only relax for me so much where her ass was concerned, and I was quickly finding more resistance as I pushed deeper and deeper, starting to thrust to work my way further.

She could feel it, too. How I was throbbing with need between her cheeks, especially as both her body and her bedroom noises continued to encourage me. “Fuck!” she exclaimed, her voice both breathy and a little bit strained. “I’m- I’m better. Say it!”

For fuck’s sake. Maybe she really did have a sister complex, or was just excited about fucking her sister’s boyfriend and refused to let me forget that she was better from a sexual standpoint. Either way, I was too far gone at this point to care about the fact that I was cheating on Jessica. “You’re better,” I grunted. Whatever. It didn’t matter. I had more pressing things on my mind. Also, she was in no position to be making demands, which I only considered after going along with it.

Whether it was the echoed words or how I was starting to thrust for real, she let out a moan that sounded particularly loud in the resonant bathroom. So much for keeping things down to avoid potentially being overheard. Hopefully Jess was already asleep after a long drive and a stressful week of midterms. Or maybe she’d assume it was just Natalie fingering herself and not being particularly discreet. Although since I was here, maybe my girlfriend would deal with the awkwardness of knocking on her door and telling her that she could hear everything through the vents? My mind rapidly projected through Jessica finding her sister’s room empty, walking in on the two of us, and . . .

Fuck. I should have been nervous about the prospect of being caught, but the risk was somehow hot at the same time. It was probably just the fact that I was horny and not thinking rationally, but I couldn’t deny that fucking Natalie was suddenly more enticing than it had been all day.

Meanwhile, Natalie didn’t seem worried either. After another moan that echoed off the tile around us, she exclaimed, “Harder!” It was too insistent to really count as begging, especially as she began rocking her hips to get more from me.

“Shut the fuck up, brat!” I snapped back. Honestly, it wasn’t about lowering her volume. As I tightened my grip on her waist and worked her body until our rhythms were perfectly in sync, I was trying to remind her that I was in charge, especially in a position like this. Even if it never really felt like that when Natalie was such a flirt.

Sure enough, she didn’t play submissive this time around. “Make me,” she exhaled. Then, to further taunt me, she let out a more porn-like moan, complete with tilting her head back to an exaggerated degree.

The way she was faking it bothered me a lot more than her response. All day, her reactions had been more natural, and somewhat familiar due to the noises I was used to hearing from her sister; fucked up as it was, that was why I knew Natalie was being genuine with such things, despite how she acted the rest of the time. Between that, and the lilt in her voice as she challenged me with those two little words, I stopped holding back entirely.

Fucking her properly, and fucking her hard, I moved one of my hands up to her chest to grope at her breasts while thrusting deep into her ass. Purposely screwing with the rhythm we had leading up to this, leaving her to catch up with the sudden intensity, I took immediate satisfaction in the breathy yet shrill ‘OhmyGod’ I drew from her lips.

To her credit, she adjusted pretty quickly, working her body against mine as she began moaning in a way that was a lovely combination of pleasure and pain. After everything, she deserved to hurt a little bit–in a good way–plus she had both asked for it and baited me. If it was ever too much, she could say so, though I highly doubted she would. Natalie had enjoyed it when I called her a slut earlier.

I was also rather focused on my own pleasure. This kind of penetration was different, obviously, and it felt fucking amazing in both the physical and emotional sense. The dynamic, the energy, the persistent wrongness of all this, not to mention the tightness around my cock that only felt better the longer we were going at it.

With every thrust, I could feel myself getting closer and closer to what was going to be an unforgettable climax. And, before even getting there, I was starting to wonder if I would be able to do this again with Natalie before the end of the weekend.

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