I watched the shadowy lithe form of my sister stand up and fumble around. Liv swore, hit something, swore again, and then said ‘fuck it’ and hit the light switch. I squinted in the light for a second, and was treated with an incredible sight. My sweat covered nubile sister, bending over with her incredible ass outstretched, a clear bead of my cum dripping out of her and running down her leg. I thought she was going for a towel to wipe it up with, but she wasn’t. She was grabbing one of my shirts. She threw it on, the hem came past her waist, almost half way down her thighs. It was sheer enough where you could tell she didn’t have a bra on, but to betray the rest of her nakedness she’d have to bend pretty far over.
She glanced back at me. “You coming or not, asshole?”
“Just admiring the view.”
She smirked and hit the light switch, again becoming only a shadow. “Well this ‘view’ is going for a night swim. And she ain’t waiting any longer.” With that Liv left the room out the open door, the sound of the ladder betraying her descent.
I jumped off the bed looking around in the darkness for clothes, while trying to figure out how many I needed. I knew they’d be shed the second we got to the water, but there was still the chance of running into either parent, wondering why we were leaving, or just going for a midnight piss. I settled on a pair of shorts, no boxers, hoping it would be enough in the dark. Liv waited for me at the door. She worked it open gently, trying to make as little noise as possible. I followed her lead, trying to be as stealthy as her when I shut it.
“Doesn’t look like we woke them.” I said, speaking at normal volume for the first time all night. I had looked at their door, but it was closed, light off.
Liv laughed. “So what if we did? They’ll never be able to prove anything now.”
“I think there’s a certain amount of genetic material up there that begs to differ.”
“You had a wet dream, it grossed me out so much I needed to go for a walk.” Liv said, shrugging. “See how easy that is? We’d be fine.” She then leaned in close to me. Taking a finger, she reached under the shirt to the inside of her legs. When she brought it back out, It glistened with my cum. Liv waved it in front of me, an evil grin on her face. “Unless they noticed your cum dripping out of me. Then we might have a problem.”
I gulped audibly. She heard it, and started skipping down toward the lake, unable to contain her laughter. I could kiss her, I could fuck her, I could cum in her, and my sister would still mess with me every opportunity she got. Cracking a smile, I shook my head and followed.
Even out of the loft, it was still a hot and muggy night. We walked fast, not wanting to give ourselves time to get eaten alive, knowing we’d be much safer from the bugs once in the water. About halfway there, Liv pulled the shirt off, going naked again. I followed suit, shrugging off my shorts. We ran together, headlong into the water, our loud splashes jarring in the otherwise peaceful night. The water felt amazing, as always, cool against our overheated skin. We waded out quickly, wanting to submerge as fast as possible. Once a little past the floating platform, we were able to easily stand with the water up to our shoulders. Or at least I was.
Liv swam over to me, and latched on, wrapping her legs around me tightly. “My tall brother is able to stand all the way out here? So impressive.”
“You’re lucky your tall brother likes you so much.”
“Likes?” She pouted, and started kissing up my neck. “I’d hope my brother loved me.” She didn’t give me a chance to respond, making it to my mouth and planting her lips on mine.
Already much cooler, thanks to the water, our naked bodies pressed into each other. Liv’s boobs were pressed against my chest, her legs getting their leverage on my hips. It was electric, that contact, our skin still warm from the day’s sun, and the night’s activities, relieved by soaking in the cool lake bath. My cock had never really gone all the way down, and now fifteen or so minutes after I came, it was fully recovered. Floating in the water, it nestled up into her ass, Liv basically sitting on it in the water. She felt it and wiggled naughtily.
“There you go poking me again.”
“Is that a complaint?”
“No, more like an observation.”
We kissed some more, and I walked us around, but we didn’t spend very long out there at all. Even though we were mostly submerged, there were still bugs finding our heads and shoulders. And as hot as we had been, I could feel Liv hugging tighter as she started to go from cool to cold.
“Maybe a quick shower?” I suggested.
Liv nodded hurriedly. “I like the sound of that.”
We ran back to the cabin, same as we’d run out to the lake, trying to give the mosquitos as little time as possible. We grabbed up our makeshift modesty covers, but as we approached the cabin and saw no lights or movement, risked it by not putting them on quite yet. I went in first, opening the door quietly. It was exactly as we left it, the parents door still closed. Liv slipped in and went right for the bathroom. I shut the door quietly and tossed our clothes in the corner. Then I followed my sister into the bathroom, shutting and locking the door behind us.
“How’s the water?” I asked Liv, who stood under the running showerhead with her hand outstretched.
“Heating up faster, but not hotter. Probably for the best.”
“Yeah, we’ll be hot again soon enough.” I said coming over to stand next to her. She turned into me as I did, reaching her other hand to my cheek and giving me a quick kiss. Another thirty seconds or so and she stepped under the stream.
“Good enough,” was her assessment.
I joined her. There was no build up this time, no discussion, no teasing, no playing with each other. We both knew what we wanted now. Liv’s hand went straight to my hard cock, and mine went to her asscheeks. She gave my rod a few frantic tugs as I kissed her neck, working my way down into her collarbones and shoulders, before bending over and taking a nipple in my mouth. Already breathing hard, Liv took a sharp breath as I rolled her nipple in my mouth, playing with it with my tongue. I would never be able to get over how much I loved her body. Her breasts were full and perky, perfect mounds. I started to go to my knees, intent on eating her pussy, but she stopped me, grabbing at my chin to keep me from going lower.
“Later,” She said, “We don’t know how much time we have, and I want you to fuck me. Hard.”
“Hmm, I don’t know.” I enjoyed her wanting me. “but I suppose if you insist, then yes, I will fuck you. Right now even.”
“Good.” Liv kept her hand on my chin, leading me to her mouth, where she allowed me a short and tender kiss. Then she turned around, leaning forward with her hands on the wall, sticking her ass out to me. “I insist.”
I got closer to her, letting my dick rub against the top of her ass. I leaned over and kissed her upper back, and her shoulders, while teasing at her slit with one of my fingers. Having just come from the lake, I wanted to make sure there would be enough natural lubricant. I needn’t have worried, my sister was as ready to go as I was. I rubbed my fingers against her first regardless.
“Stop stalling, and fuck the shit out of your sister.” She whispered, frustrated with my teasing.
I didn’t reply. Instead, I took my dick in my hand, and put it at her pussy entrance. I gave it one, two rubs, then thrusted forward. It wasn’t as smooth as it had been earlier with the extended foreplay, but I pushed through, sinking my cock once again inside my sister. Liv gasped at the sudden penetration, and I watched her fingers curl against the wall. Once all the way inside her, I leaned forward to put my mouth by her ear.
“That would have gone easier if you’d let me eat you out first,” I said.
“Who said I wanted it any easier?” She retorted. Fuck I loved this girl.
I gave her what she wanted, fucking her fast almost immediately. It was eerily reminiscent of my own fantasy from earlier that day, where I’d put us in this exact position. Just mere hours ago, this had been an impossible taboo, and yet here we were. I slid in and out of her as quickly as I could without slipping out. Liv let out a few quiet moans, but I wasn’t much worried about sound this time. Our parents were much more likely to hear the sound of my balls slapping against her, but even that was not as loud as the shower itself. I had both my hands clutching her on either side, right above her hips, helping me pound into her, pulling her on and off my cock as much as thrusting in and out. Liv reached one of her hands under her, I assumed to start rubbing her clit. I took that to mean she was close, and so picked up my pace.
This was the special second round. The second fuck that happens after you’ve saved up your energy for multiple days at a time, and then already cum once. I had used this strategy before, something about going two rounds, in this way, made me feel like a superhero of stamina during the second act. And fucking Liv now, hard and from behind, exactly as she wanted, I got that feeling. She shook under me a few times, whimpering, before finally grabbing at my chest, signaling me to slow down. I still hadn’t cum, and went back to long and leisurely strokes. After another minute, Liv stood up straight, causing me to pop out of her, and she turned around to kiss me.
“Fuck you feel good.” She said through my mouth, her tongue worming its way around mine.
“Fuck. You feel good.” I told her back. Liv’s copper skin held a glistening flush, and her eyes fluttered, as if she could hardly feel herself.
“You weren’t close were you?” She said, a brief bit of concern in her voice.
“Not right that second, no. But I can be.”
“I want you to cum again.”
“I can do that.” Liv kissed me passionately and then pulled on my arm, leading me out from under the water.