“Oh please, like you weren’t buying drinks for me the whole time we were on the cruise.” Liv replied, rolling her eyes at him. I raised an eyebrow at my dad. The cruise was the family trip they’d gone on last year, just the three of them.
“That was different.”
“Yeah, what we’re doing is legal,” Liv said. Mom and I laughed.
I sat around for a while, sipping my drink. Liv made one for herself and sat with me at the counter. Dad helped mom unpack and put away the rest of the stuff. I was still shirtless, but Liv had put her shorts and a cover over her bikini for their trip to the store. We moved with our second drinks to the couches.
“We’re going to go for a walk.” Our mom told us. “You kids will be okay right?”
“We can entertain ourselves.” Liv answered for us both. “I want to tan some more. Catch some late afternoon sun. I’ll make Will come with me.”
“Does Will want more sun?” Mom asked her but looked at me.
“I might just stay here.”
“Oh don’t be like that.” Liv pouted. “I haven’t seen you in so long, and you’re going to let me lay out there all by myself?”
“I might get too hot.”
“You can jump in the lake whenever it gets too much. I want to go out on that floating platform anyways.”
I wasn’t convinced.
“Well whatever you decide, don’t drink too much too fast,” Mom said. Dad had already put his shoes on and was waiting outside. “We’ll be back in an hour or so, I think your father is determined to see the other side of our cove here.”
“Have fun!” Liv and I told her, teasingly. She shut the door behind her and Liv turned to me again.
“Please come out with me?”
“I really don’t wanna get burned.”
“I promise you won’t. I’ll do your sunscreen myself.”
I hesitated.
“You really expect me to believe you don’t want to ogle me some more?” She stood up then, shrugging off her shorts and cover, once again exposing her scanty bikini. I almost audibly gulped. Sure as shit I wanted to ogle her. But I had also seen another opportunity for much needed alone time. I didn’t know how to express that to my sister though. ‘I don’t want to hangout with you because I need to jack off.’ Yeah, that wasn’t good enough. I sighed, and she smiled, knowing I’d just given in.
“You better get every square inch.” I said, handing her the sunscreen.
“I will.” She said, a silly grin on her face.
I put on my swimsuit and we walked down to the lake. Holding the sunscreen and two towels high above my head, we waded out to the floating platform. I threw the stuff on it, then pulled myself up, Liv close behind me. It was decently stable, but still swayed with our weight. Careful not to fall off, we dried ourselves a bit, then spread out our two towels. Extremely faint sounds drifted from the larger part of the lake, carried by the lazy summer breeze. However, around our bend in our little cabin cove, we were the only two in sight. I noticed Liv looking as well, and got the sense she was watching for anyone else, but wasn’t immediately sure why. I got my answer quick enough when, confident we were alone, she quickly undid her top, and slipped off her bottoms.
“Close your mouth Will, you look like a rabid dog.” She said with a slight smile on her face.
“What the hell are you doing?” I asked. I only got the briefest look at my naked sister before she lay face down on her towel, ass up.
“I don’t want tan lines.” She said matter of factly. “No one can see us, anyone who even could would be too far away to tell. Now get over here and put sunscreen on my back.”
Speechless, I picked up the bottle of lotion and lurched toward her, the platform a little unsteady under my feet. I kneeled next to her, and rubbed in the sunscreen, trying not to stare at her ass, and the clear view I had of the back of her sex.
“I don’t want my ass to burn because you’re shy.” She said, head on her hands tilted up at me and smirking. “Come on now.”
I nodded, still a little shocked, and took her ass in my hands, rubbing the lotion in. It was firm. I tried not to squeeze too hard. Suddenly self conscious I glanced back at her face. She had moved to look forward, chin in her hands. Eyes closed, she didn’t react to my touch. I did my best to look at the situation practically, focusing only on making sure I got every bit of skin. We had done our legs back at the cabin, so the ass was where I stopped. When I finished she mumbled a thanks.
“Don’t feel bad about freeing yourself either. I certainly won’t complain.” Liv added after a second. Her voice was hard to read. Maybe it was the tequila, maybe I was finally just getting a little bit more comfortable with the casual nudity, but I thought what the hell, and pulled off my swimsuit. I wasn’t as hard as I had been the last few times, but was close enough. Before I could get any more uncomfortable I copied Liv, laying face down on my own towel.
“Ugh..” She sighed, turning toward me. “Suppose I should return the favor before I get too comfortable.”
Liv pushed herself up onto her knees, grabbed up the sunscreen and crawled over to me. I felt the cold squirt of the lotion on my back, and then her hands were on me, rubbing it in. She was very thorough, almost massage-like, and I found myself closing my eyes, enjoying the sensation. My cock strained, but it was safely trapped under me, and the uncomfortable position of it tamed my arousal somewhat. Liv did not hesitate as she got lower, rubbing a healthy amount into my butt. “There you go,” she said finishing up. My turn to mumble a thanks as she retook her position face down next to me.
We lay in silence for a while. The day was still hot as hell, but the sun was less intense as it approached early evening. Tanning like this was not something I normally did, but there was something undeniably enjoyable about sunbathing next to a naked girl, even if it was my sister. I peeked an eye open, glancing at her ass and bare back. Fuck, I thought, especially if it’s my sister. I tried to think of something else, looking away and concentrating on enjoying the warmth of the rays and the pleasantness of the day. Eventually I closed my eyes, and dozed, not quite asleep but not awake either. Meditative.
“Flip.” Liv said at some point, breaking me out of my trance. She rolled around onto her back, shielding her eyes from the sun with her hand.
I opened my eyes and followed her lead, trying not to stare at her as I did. My dick sprang up, but I hurriedly laid my trunks across my bottom half. For modesty sure, but mostly because there was no chance I was risking a sunburn down there. Liv said nothing. Luckily the sun was so bright it kept me from spending the entire time staring at my sister’s body. Even though she’d acknowledged my gaze, I didn’t quite feel comfortable openly staring yet. We didn’t stay on our backs as long, and Liv was soon saying we should flip again, and reapply.
“You need to cool off?” her eyes squinted at me, her cheek against the towel. “Better to dunk now so as not to wash the sunscreen off.”
“Nah I’m good.”
“Alright then, on your stomach.”
“Whatever you say. Here, let me get you.”
“I went first last time, let me.” She said, as I had moved to grab the sunscreen. I accepted and turned instead, going back to laying flat. I tried not to look as she sat back on her thighs, her nakedness hard to ignore as she came closer. Her skin glistened invitingly around her nipples, her toned stomach flexing. She caught me looking. I cleared my throat and looked away, but not before I saw her break a mischievous grin. Cold lotion hit my back, and her small hands were rubbing me up and down once again. Liv worked just as efficiently as she did the first time, but I could have sworn she gripped my ass a little tighter once or twice, and let the tips of her fingers graze my scrote, almost touching my balls.
“Alright, my turn.” She sprawled again, looking over at me expectantly. I pushed myself up onto my own legs. My cock quickly stood tall, twitching once or twice. Liv made no attempt to look away. She watched it unabashedly, before her eyes trailed up my own chest and we made eye contact. “I’m waiting.” She breathed.
I lathered her carefully. The first time my dick had been safely covered by my swim trunks. Now all it would take is a slight shift forward and down, and it’d be jabbing her in the side. It didn’t help that the platform swayed in the water, making my balance less than sure. I was so tense, I didn’t realize how hard I was pressing the lotion into her, more working her back muscles than simply applying sunscreen. I realized I was giving an inadvertent massage when I hit a knot under her shoulder blade. Instinctively I worked it out, and she let out a soft moan.
“Oh my god, that feels good.” Liv sighed. “Think you could do that all over my back?” She glanced behind herself up at me. “While you’re there that is?”
“Wait a second,” I said. “Did you want to go second this time so you could trick me into a massage?”
Her face was pure innocence. “I plead the fifth.”
“Scheming brat.” I said, “I”ll give you one, just let me throw my trunks on. This thing is too unsteady,” I referenced the makeshift dock we were on. “I need to sit on your back in order to press hard enough.”
“Why would you need your swimsuit for that?” Liv asked.
“Uh, do you want me sitting on you naked?” I asked in response. “Don’t know if you’ve run the physics in your head, but a certain something would be laying on you.”
“I don’t mind…” Liv said. She spoke quietly, and she had turned her face away and closed her eyes again, so it was hard for me to read what she wanted. I took it to mean she was leaving the decision up to me. I knew what my dick wanted. But I wasn’t sure what I wanted. I struggled with it for a second. Was this crossing a line? Massages were sensual, but not inherently sexual. It was no different than being in the shower together, or applying lotion, both of which we’d done naked already. I wondered if I’d be brave enough to do what I was about to do if I’d been able to jack off that morning. Best not worry about that. I pulled myself carefully on top of her.
I sat in the small of her back, a little above her butt. I kept myself on my knees, so as not to put my full weight on her, but skin touched skin. I became horribly aware of my balls nestling on her back, as well as my thighs pressing into her sides. For once I was thankful my dick was hard, otherwise it too would by laying across her back. I thought at any moment she’d say she’d been joking, call me a perv, and say she was going to tell mom and dad. But she didn’t. Liv stayed still, breathing calmly under me. I took a deep breath and started the massage, focusing on her upper back, shoulders and neck first. She sighed in pleasure under me.