My sister Cassie and I, after playing a round of "Truth" with some friends we met on the nude beach, were contemplating whether we would stay for a few rounds of "Dare." After giving it some thought, we decided to go back to our room. She was getting tired, and we decided we didn't want to be up too late if we were going to do the nude beach again in the morning.
Everyone was disappointed that we were leaving, especially it seemed, Logan, who was absentmindedly stroking his cock as he was talking to Cassie. I suspected that he had already worked through a couple of dares for he and Cassie, but that would have to wait.
We decided that we'd all meet at nine for breakfast in the restaurant and then we'd go down to the beach together.
Cassie and I grabbed our clothes, with everyone saying how glad they were that we came down to their room. We had sort of a group hug before we got our clothes on and left, and I noticed Logan's semi jerked a little when it brushed against Cassie's thigh when they hugged.
Cassie and I went directly to our room, and when we walked in, Cassie went over to the sliding doors leading to the balcony and walked outside, with me following close behind.
"Isn't is beautiful here?" she asked, looking at the ocean in the moonlight.
"Yeah, it really is," I replied as I put my arms around my sister from behind and held her close.
We stood there looking at the waves as they crashed on the shore for several moments in silence, until Cassie spoke again.
"You know what I'd like to do?" she asked.
"What?"
"I'd like to take our blanket down and sit on the beach and watch the water for a while. Wanna do that?"
"Sure. Are we going to the nude section?" I asked.
"Of course," she replied as she turned and kissed me passionately.
"Let's change into our suits, although I don't think we'll have them on very long once we get there," she said.
Both Cassie and I changed into our swim suits, while she grabbed her beach bag containing the blanket, and we headed to the elevator. Once outside, we started walking along the beach to the sign announcing the possibility of nude bathers.
"Well, time to get rid of the clothes, brother," Cassie said as she immediately slipped out of her top and bottoms, dropping them into the beach bag. I did the same, and then we started walking nude along the water's edge. Cassie looked especially beautiful as the moonlight reflected off the water and onto nude body. She looked like a goddess or something.
We passed several couples who had the same idea; some young, like us, and several older couples as well, including one family with their teenaged children, all walking nude along the ocean.
We found a spot a few yards from the water and spread out our blanket. I spread my legs, and Cassie sat between them, with her back to me, as we faced the ocean, taking in its beauty and the soft sounds of the waves crashing against the shore. Other than that, it was quiet out, other than a few voices as people passed by.
I brought my hands up and startled touching Cassie's breasts, as she sighed and leaned her head back against my chest as I continued. I noticed her nipples becoming erect, and it wasn't because of the coolness of the air, as it was still warm out, even though it was late.
Cassie turned and kissed me once, and then a second time, sliding her tongue into my mouth. God, she tasted good. I was falling deeper in love with my sister by the minute, and was sorry that we never hooked up before a few weeks ago.
After a few minutes of kissing each other and me fondling her breasts, Cassie turned around, pressed me back onto the blanket and climbed on top of me. I reached down and planted a hand on her firm ass as we made out on the beach.
I could feel my cock growing as it was pressed firmly against Cassie's abdomen as we continued kissing, with her still on top of me.
I grabbed her ass harder and started slipping my fingers down her crack, feeling her soft pucker, which seemed to excite her even more, as she started grinding her crotch against mine.
Cassie kissed my mouth hard, and then started licking her way down my face to my neck, my nipples, my abs, and then began licking my hard cock, which was standing straight up. Cassie took the head into her mouth and then moved her mouth all the way down until her face was buried in my pubes, which I remembered I needed to trim before tomorrow.
She started moving her mouth up and down on my hard cock, biting it softly, and rubbing my balls as she continued sucking me off under the light of the moon on the beach.
I watched as several couples walked by, each noticing my Cassie on her knees leaning over my cock, sucking me with her ass in the air. People looked, but nobody said anything. God, it was an erotic moment with my sister.
Cassie continued this for ten minutes or so, and then started licking my balls, and then back around to my thighs, abdomen, and up to my nipples, as she then crawled up on me, sliding my cock into her pussy as she leaned forward and kissed me hard again.
I brought my hands down to her ass cheeks, and held them as she started gyrating on my hard cock, pushing herself back until I was all the way in her, and then pulling off until I just about popped out, and then pushing back again. She continued doing this very slowly, which was driving me absolutely crazy, it felt so fucking good. When she moved back, I pulled my hips up, driving my cock deep inside of my sister, still holding her ass and kissing her mouth.
We soon got into a steady rhythm, and increased our speed and intensity as we made love on the nude beach. God, it was erotic.
I reached up and started rubbing her breasts, first one and then the other, pulling her forward so that I could taste them. Cassie lowered one breast into my mouth as I ran the tip of my tongue over her erect nipple, and then took it into my mouth, sucking it gently, as she slowed her movement on my cock, which was still buried deep within her.
I switched breasts, and started sucking the other one, the same way I did the first, savoring the taste and feeling of her soft flesh as I ran my tongue over her breasts and nipple. Cassie started moaning as I sucked on her nipples, and then started riding my cock harder as I slipped my hands back down to her firm ass, taking a cheek in each hand, massaging them softly as she increased the rhythm with her wet pussy surrounding my hardness.
Cassie started bucking her hips harder against me, and I could hear her gentle moans increase in intensity.
"Oh, god, Tim, Oh god, that feels so good. I love you're cock deep inside of me," Cassie said. "Oh, god, fuck me, brother, fuck me," She continued, driving down harder on me as I thrust into her as deep as I could.
Cassie sat up on my cock, pressing down to take it all the way in, and then started bouncing on my hardness faster and faster as I watched her breasts flopping wildly in front of my eyes. I reached up and held them as she continued driving up and down on my cock.
"Oh, god, yes, yes, yes," she cried out as I felt her pussy spasm around my hard cock.
"Oh fuck yes, I'm going to fucking cum, Tim, I'm gonna fucking cum. Fuck me!"
I started driving my cock into her as hard as I could, thrusting into her as she came down on me. Both of my hands were on her hips, pulling her down hard as I thrust back into her. We continued like this for a few more minutes until I could feel Cassie's pussy clamp around my cock, milking my cum out.
As Cassie came on my cock, I started unloading my sperm into her through an intense orgasm. I don't know what caused it to be so intense; maybe it was being on the nude beach, I don't know, but it was. I filled my sister with several loads of cum, and I could feel it leaking out of her and down my hips.
Cassie leaned forward and kissed me, driving her tongue deep inside of my mouth as I reached around her and placed my hands on her soft ass again, rubbing it gently.
"God, that was good, Tim," Cassie whispered in my ear. "Did you like, you know, doing it on the beach?"