Part 38

I was tempted to go right for it.

Natalie was in position, she had taunted me with this numerous times at this point, and I was ready to take a little control after her shameless advances that continued to jeopardize my relationship with Jessica. There was also the justification that as soon as I fucked her like this, we could theoretically be done fooling around behind her sister’s back. Obviously I knew that such logic was ridiculous when I was naked in the shower with Natalie, and I couldn’t push all the blame on the seductive eighteen year old, but I wasn’t exactly thinking with just my brain at the moment.

She yelped in a playful way when I spanked her. Looking forward now, she tilted her head from side to side, as if she needed to crack her neck to prepare for what was coming. “Jessica has good taste,” she murmured.

I couldn’t tell if she was trying to bait me, or just remind me of my girlfriend’s existence with the casual ‘compliment.’ Either way, I slapped the same side as before. “Shut up,” I simply said. She wanted me in charge, unless that was just another tease. And she liked her boys rough, which made one sister who was into that stuff. Deciding to preempt whatever bratty response she might think of, I gave her another spank. “And behave.”

Natalie jumped a little bit at the third slap, then proceeded to do her usual ‘obedient but not quite obedient’ thing in response to my bossy treatment of her. While she didn’t say another word, she let out a content hum and gently swayed her hips from side to side.

Though I knew in the back of my mind that I didn’t have anything to prove to her, all things considered, I didn’t want to just shove it in. Part of that was my experiences with Jessica, and how she appreciated a decent amount of foreplay; I also didn’t want to give Natalie the satisfaction of immediately caving while she was flaunting herself and all but inviting me to take her from behind.

Splitting the difference, I held her hips and pressed myself against her. Despite the occasional sister references that made me hesitate whenever I remembered who I was doing this with, I was fully hard now that I was up against Natalie’s ass.

Ever the temptress, Natalie was quick to bend slightly further over and shift her weight in a way that ensured that we were more rubbing than brushing. Fuck. As usual, she knew what she was doing.

I wasn’t going to say it out loud without being prompted like before, but she really was better. In the physical sense, at least. My first time with Jessica was good, yet it still took a little while for the two of us to really sync up and get used to each others’ bodies when it came to intimacy. By contrast, everything with Natalie felt so natural. That, and the obvious fact that only the younger sister between them was offering this.

Gliding my hands up and down her sides, I briefly considered kissing her neck like I would sometimes do with Jess when I was embracing her in a similar position. Dismissing that instinct, both because of the angle of Natalie’s body and the fact that this was more about sex than anything else, I instead pulled her further towards me and worked against her hips with my own movements. “Ready, brat?” I quietly asked.

“Am I allowed to talk again?” Natalie replied, in the familiar teasing lilt.

Ignoring the obvious, in that she was doing so anyway regardless of the answer, I muttered the first thing that came to mind. “Only if you hold still.”

“Mmm,” she hummed, “Then, yes. I’m ready, babe.”

I was definitely ready, too. In a way, I had been edging myself by resisting her advances to some degree as she threw herself at me. Now that we were in here together, and my manhood was pressed against her lower curves, no amount of self control would be enough to keep me from doing this with her. This was theoretically the last time we were going to be sneaking around like this, as well as a pretty big first when it came to the more promiscuous of the two sisters. Whatever self control I did have left would need to be spent pacing myself, after being teased for so long.

Last time I had penetrated Natalie, she had literally guided me inside her. It had been pretty unique as far as seduction went, even if we ended up being interrupted by Jessica shortly afterwards. This time around, I’d get the chance to do things myself, and there was no rush. Hopefully. We were probably pushing the limits of the lake house’s water heater, but the shower’s temperature hadn’t dropped so far.

Reaching down and cupping the same cheek I had spanked a few times, while staying close enough to continually brush my cock against her, I gave her a good squeeze while adjusting my weight and preparing for the necessary angle. Then I lightly traced my fingers between her cheeks, both as a tease and a way to get a better sense of her size.

Natalie stilled in anticipation. “I’m all yours,” she said, “Fuck me as hard as you like.”

With pleasure. Unless Jessica was suddenly open to stuff like this, I wasn’t going to have another opportunity to do so with a girl any time soon. Well, assuming that I still had a girlfriend after this trip. Positioning myself just right, I pushed my tip between her cheeks ever so slightly. Partially as a tease, as well as testing the waters while we were doing this without a drop of lube.

Of course, this was Natalie. She seemed to be a natural at everything sexually related. I was guessing she could take it, especially since she had just given me permission to fuck her as hard as I wanted.

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