My Sister the Christmas Cruise Slut

"I like how you feel in my mouth," she said, flashing me a smile as she pulled away. She got naked, laid on her bed, and started fingering herself. She kept looking over at me without saying anything. I could guess why. She wanted my help and was afraid of asking for it. I caressed my cock, still wet from her spit, and considered helping her. Would it matter if I went down on her again? Holly softly moaned. Her body went rigid and she came, removing the temptation from me. I turned off the TV and went to sleep wondering if things would ever feel normal between us again.

Holly and I woke up naked and not caring about it. Well, I say I didn't care, except I got hard a couple times from seeing her naked and being naked around her. She took the first shower and came back into the main portion of our room still naked. After my shower, I did the same thing, a bit surprised to find she was still lounging around the room naked. Our eyes were filled with lust for each other and it nearly felt natural being naked and hard around her. Why shouldn't we be naked around each other? After our last two nights, what difference did it make?

The ship had docked again at our second port of call during the night. Again, we ate breakfast onboard before heading down the gangplank. We found our parents and had lunch with them. Mom and Dad looked as if they were having plenty of fun without us. They told us about the comedian they had watched the night before and seemed very happy how well we were getting along.

That afternoon, we found a cafe with good internet and spent a couple hours catching up with our friends. Of course, neither one of us could talk about what was really on our minds, the couple we had met.

Back onboard, it was my idea to have dinner with our parents. For some reason, it felt safer being around them. If we were together as a family, Holly couldn't flirt with me and I wouldn't think about her in a sexual way. But after dinner, Holly and I had a date. As soon as we went back to our stateroom, Holly stripped naked. "I'm so horny," she said, squirming and clutching herself.

"Let's get a drink before we meet them," I said, fighting off the low fever of excitement I felt, too. Holly slipped into a nearly sheer sundress she had bought in town. That was the only thing she wore. I wore loose fitting shorts and tight t that accentuated my muscular chest and big arms and we went into the same dance club with a couple hours to kill. I watched how our server eyed Holly. We took a chance ordering mixed drinks. The server, a guy, didn't hesitate and filled our order.

The night was early but people were in the mood to party. The music was loud and people were dancing. We sucked down our first drink and ordered a second before we hit the dance floor, too. I was transfixed by Holly. Her sheer dress attracted as much attention as her bouncing tits. On the way back to our drinks, she nodded towards a couple women sitting together. "They can't keep their eyes off you," she giggled. I laughed. Hadn't she noticed how every guy in the place was staring at her?

Holly sipped at her second drink while I tossed it back and ordered a third. I asked if she wanted to do a couple shots, but she shook away the idea. "I don't want to be drunk tonight," she said. "I want to remember everything that happens." I didn't share her thinking and wanted as much liquid courage as I could manage without becoming falldown, stupid drunk. I didn't trust Lisa and Sean really wanted to swap.

We knocked on Sean and Lisa's suite, arriving precisely on time. "Damn, you look good enough to eat," Lisa squealed as soon as she saw Holly. After giving Holly a big, friendly hug, she reached for me. "Mm," she purred in my ear as we hugged. Lisa wore a different bikini top and another flowing skirt. I could guess she naked beneath it.

"Hey there," Sean said, already pouring out drinks for us. He gave Holly a hug and kept her next to him. Lisa stayed draped around me and I gave up worrying about the lump showing inside my pants. When we moved to their seating area, Holly sat with Sean and I sat on the couch with Lisa. She put her hand on my thigh, gently caressing my leg while my big cock tented the front of my shorts.

"So, what did the two of you do all day?" Lisa asked as if nothing special was happening.

"Went into town," I said, setting aside my drink. I put my hand on her chest, caressing her breasts as we talked and growing more excited. Maybe this was going to be okay after! I felt her nipples harden beneath her string bikini top and gently circled one of them as I talked. "Holly did some shopping."

"That's where I bought this," Holly said, watching us with eager eyes.

"It looks beautiful on you," Lisa told her.

"Stand up and model it for her," I suggested. Holly stood in the small space between us and slowly turned while modelling her new dress.

"Gorgeous," Lisa said and I didn't know if she was talking about the dress or my sister. Did it matter? She reached out and ran her hands over Holly. "I like how it hugs her waist." Holly faced her, smiling. Lisa's hands slipped upwards, cupping Holly's full breasts. "It feels lovely, too."

"You feel lovely," Holly said.

My fat cock throbbed hard inside my shorts as I watched Lisa squeezing and playing with Holly's big tits. "Sometimes I wish my tits were bigger."

"No, you are perfect," Holly insisted, reaching down and cupping Holly's tits. "I love your breasts."

"Are these buttons down the front just for show?" Lisa asked. She undid the top one and then the next one and one after that until the top of my sister's dress fell open, held on her body only by the straps on her shoulders. When Lisa slipped a hand inside her dress, one of those straps fell down Holly's arm. When she shrugged off the second one, the dress fell to the floor.

"Oops," Holly giggled, naked from head to toe.

"You are so beautiful," Lisa said, pulling Holly close and kissing her flat stomach while her hands slipped around her trim body. Holly straddled Lisa's knees and sat on her lap. Their lips met and I watched from my ringside seat as the two girls kisses as deeply and romantically as any man or woman. As they kissed, Holly worked the ties behind Lisa, pulling off her bikini top. They pressed their bare tits together and moaned.

I took off my shirt and shorts while watching. Clothes didn't matter any more. Sean did the same and, like him, I casually stroked my hard cock as I watched the two girls kissing and making out. We traded rakish smirks, but didn't say a word.

"I want you," Lisa softly murmured. She urged Holly off and stood. Lisa lost her skirt, exposing her bare bottom and cute tanlines before grabbing my sister by the hand and leading her to the big bed. Holly climbed on the bed. Lisa looked over her shoulder and Sean and I, waving for us to join them.

Sean sat on one corner at the foot of the bed and I did the same, giving the women as much room as possible. They took up the middle of the bed, with legs and arms wrapped together as if they were two snakes wrestling while they kissed. I couldn't touch my swollen cock. I was too hard and too excited watching the lesbian action taking place in front of me. My big cock ached and throbbed with need I would resist as long as I had to. I thought I was doing pretty good, too, until Lisa asked Holly, "Ready for your boyfriend to watch you eating pussy?" A clear droplet of pre-cum leaked from my throbbing cock.

Lisa rolled on her back, leaning against the headboard. She bent her knees and parted her legs wide for Holly. My sister started with Lisa's lips, kissing downwards, over and across both breasts before started a trail down her stomach. Holly didn't hesitate as she reached the tiny tuft of pubic hair. When she began licking Lisa, the room filled with four moans and only Lisa's moans didn't end.

"Oh, she's good," Lisa reported, caressing Holly's face for a moment before she held out her hand towards me. She pulled me closer until I was directly next to her hip. Lisa caressed my head. "Doesn't she look sexy doing that?"

"Yes," I gasped. Holly opened her eyes and saw my face so close to hers. I saw the fire in my sister's eyes, a look of absolute joy and happiness. I kissed her forehead, but didn't interrupt as I wondered if I would ever be able to unsee this moment. Holly looked so full of bliss as she nuzzled her nose against that tiny tuft of pubic hair.

Lisa squirmed, moaned, and dug her heels into the bed. She pushed her hips upwards as she cried out with the first orgasm of the evening. I watched her trim body quiver and buck beneath my sister's tongue and moaned with her. Finally, she relaxed, lowering her body back to the bed, revealing Holly's face wet with from her pussy. "Kiss her," Lisa insisted, pushing my face towards Holly. Our lips met over Lisa's thigh as we kissed more passionately than ever before.

I didn't notice when Sean had slipped up on the bed, but he was laying next to the two girls. He leaned over and kissed his girlfriend, too. When their lips parted, he told her, "Your turn."

"I know," Lisa giggled, grabbing Holly and pulling her up and over her body. They kissed again before Lisa rolled them over, moving until she was on top of Holly. Another trail of kisses as Lisa moved down her body. "Kiss her while I do this," she told me. I nodded and scooted up the bed until I laid next to my sister.

We didn't start with kisses. Instead, we stared at Lisa's pretty blue eyes as she pressed her mouth against Holly's bare pussy. When Holly moaned, I looked at her face and saw her eyes flutter with pleasure. Remembering what Lisa had told me to do, I leaned over and kissed Holly, she tasted like Lisa. Our kiss was deep and passionate, growing with passion as Lisa's tongue lashing brought Holly closer to her orgasm. Our kiss lasted until Holly came, moaning into my mouth. I didn't pull away my lips until she relaxed.

Sean said something so odd that it stuck with me. "I love seeing the two of you kiss," Sean said, caressing Holly's hair. Why did watching us kiss make any difference to him?

"She's all yours," Lisa told her boyfriend, climbing over Holly's legs in my direction. "I want this." She meant my hard cock. She pushed me on my back and straddled me.

"I'm not going to last long," I warned.

"I don't care," she said, lowering her pretty pussy down and around my hard, aching cock. Along side of me, Sean had pushed Holly's knees up before he mounted her. We laid on our backs, side-by-side, and when Holly held my hand, I squeezed her hand back. We looked at each other and shared the kind of secret smile only siblings can share before our attention turned to the person riding on top of us.

I grabbed two handfuls of Lisa's beautiful breasts, playing with her pink nipples as she squirmed against me. She leaned over and kissed me. In the back of my mind, I knew the sweet tang on her tongue belonged to my sister and it pushed me over the edge. I moaned deep into her mouth as I bucked my hips upwards and came, filling her with my orgasm. Lisa moved to pull away, but I stopped her.

"Keep going," I told her, knowing that orgasm wouldn't stop me from staying hard. Lisa's face lit up with joy as she bounced up and down on me. I heard Holly's telltale moans of pleasure and turned my head. I watched Holly's face transform into her a look of stunned pleasure as her orgasm overtook her. The moment it passed, she looked at me, as if making sure I had seen her climax. I did.

"Kiss him," Sean told her and Holly did, leaning to her side until our lips met and I kissed my sister again without worrying that it was her. Our tongues met as we both received a fucking. There were moans above us, too. I glanced, seeing Sean and Lisa leaning towards each other. They were kissing, too. Lisa held on to Sean's neck, keeping her lips against him until he came. When it happened, I was kissing Holly and I felt her reaction. She clearly enjoyed feeling Sean blasting off inside of her.

Sean rolled off to Holly's far side. Lisa came and found a narrow piece of bed on my far side. Holly and I squirmed closer together to make room for them. There was a bevy of kisses and murmured words of pleasure and joy. I kissed both women. Both women kissed Sean. The bed felt very crowded and I don't believe any of us cared.

Remaining ready and hard was easy for me as Lisa and Holly both stroked me. "I think Holly wants this," Lisa purred in my ear.

"She can have it later," I said, wanting to feel my cock back inside Lisa.

"Do her," Lisa insisted with a tiny giggle and big kiss. "I want to watch."

"Let's do them together," Sean suggested, holding out his hand for his girlfriend. Laughing and giggling, Lisa climbed over Holly and I. She squeezed between Holly and Sean, facing Holly.

"Roll over," Lisa told Holly, guiding her to roll on her side so the two girls faced each other. They started kissing and groping each other's chests.

"Yeah, baby, that's hot," Sean said, working behind her. I didn't need to see what he was doing to understand it. He was working his big cock inside Lisa and I understood why we had changed positions. They expected us to do the same thing.

My hard cock rested against Holly's ass. She looked at me over her shoulder. "Do it," she purred, reaching between us and grabbing my cock. "I want this."

I tried pulling away, trying to pull my cock too far away for her to put it inside of her, except the bed was full and I was too close to the edge. If I moved any farther away, I would fall off the bed.

"Do it," Lisa said, too. She had put her hand between Holly's legs, followed Holly's hand, and cupped my balls. "I want to feel you inside of her."

I felt as trapped as I had every time we were with Lisa and Sean. What could I do? Fall out of bed, get dressed and run back to my cabin? Feeling the two women tugging at me didn't leave many options. Giving in to the inevitable, I ended my retreat. I felt Holly guiding me, pulling my hard cock towards her wet pussy until there was nothing left for me to do expect push. I did.

I pushed my hard, swollen, needful cock deep inside my sister's hot, wet, waiting pussy.

And it felt wonderful.

"Yes!" she gasped as soon as it happened. She pressed backwards against me, taking all of me, insisting on all of me. I pressed forward until I was pressing against her tight, tiny butt before pulling back and doing it again. "Yes," she repeated during each one of my first few strokes. "Fuck me! Fuck me!"

Somewhere inside of me, I felt a switch turn-off (or maybe it was turn-on? Does it matter?) as I moved in and out of my sister's tight pussy. Holly felt substantially tighter than Lisa and I felt an odd ripple inside of Holly's pussy that didn't happen when I was fucking Lisa. It took me a moment to place what was happening before I realized it was because Holly was quivering with excitement.

"Damn, you want this, don't you?" I asked, my face right next to her ear.

"Yes!" she cried out, squirming against me each time my hips pressed against her bottom.

"No, I mean, you've been waiting this, haven't you?" I asked, trying to make the question fit my meaning. "Since when?"

"Since whenever," she gasped, looking over her shoulder at me. "I've always wanted this," she said, hooking her arm up and around my head until she could pull my face closer to hers. She pulled me into an awkward angled kiss.

My body kept moving on autopilot as I struggled with how I should react. With every stroke, I felt as if I was damning myself to hell even as pleasure washed over me. "This is so wrong," I mumbled, holding her hip and fucking her harder. "So. Fucking. Wrong." I repeated, accentuating every word with a deep, pounding thrust.

"Damn," Sean said as I rocked our bed. "Hit that pussy!"

"Do it," Lisa added, watching us, intrigued by the interplay going on. "Nothing that feels this good can ever be wrong."

"Oh fuck," Holly groaned as her body went stiff in front of me. She twitched and I kept fucking her until that twitch turned into her orgasm. "Oh fuck!" she yelled and thrashed along side of me, bucking backwards against me. "Do it! Do it! Do it!"

"I'm going to come inside you," I told her, feeling my next orgasm welling up inside my balls. "All the way inside you," I insisted and buried my cock deep as her pussy rhythmically squeezed my rock hard rod. I gave one more mighty thrust before holding myself deep and shooting off my load. I came deep inside of her, throbbing against the last of her orgasm.

It took me a few moments to regain my breath. Once I did, growled at her, "Are you happy?"

"Aren't you?" she asked, once more looking over her shoulder at me.

"Perfect," I said as sarcastically as I could. "Absolutely fucking perfect." I pulled out of her, climbed off the bed and went into Lisa and Sean's bathroom. I wiped off my cock on one of their hand towels and tossed it on the floor. Had I gotten what I wanted? I got to fuck Lisa, didn't I? It only cost my dignity. I crossed to my clothes and got dressed as three naked people watched me from the bed.

"Wait," Holly said, scrambling out of bed. "Don't leave without me, please?" She snatched up her dress from the floor and darted into the bathroom. I'm sure she needed to after both Sean and I had filled her pussy.

"I'm sorry," I said to our hosts.

"Hey, it's okay. The lifestyle isn't for everyone," Sean said, reading the situation wrong.

"Take her back to the room and talk it out," Lisa suggested.

I was glad when Holly came back into the room quickly. "Sorry," she said, looking embarrassed. I didn't have anything to add and headed towards the door. Holly was right behind me. As soon as we were in the hallway, she tried to stop me with a hand on my arm. "I'm so sorry," she gushed.

"Save it," I said and we walked side-by-side back to our room.

It wasn't until we were behind that closed door that Holly broke our silence. "Can we talk?" she asked. I shrugged. "I'm really sorry if you think I led you on. I never thought we'd. . . you do know. . . do it."

"Did you mean it?" I asked. She looked confused, so I spelled it out. "When you said you always wanted that, did you mean it?"

"No," she lied before changing her answer. "I mean: No, I never thought it would happen."

"But you wanted it to."

"Maybe," she admitted. "I mean, why not? You're cute and you're always there for me. Why wouldn't I want it?"

"Because we're brother and sister," I said, confused why I had to remind her of that.

"I know, but so what? They don't know that and no one else knows that we did anything."

"I know," I said.

"Okay. You're right. You know. You know you fucked me. You know I sucked you off. And you know what else? I don't care. I liked doing it and I'd do it again."

"Do what? Set me up?"

"I didn't set you up," Holly said. "Unless you mean with Lisa. That's all I was trying to do, set you up with Lisa and me up with Sean."

For a long time, neither one of us said anything more. I'm guessing Holly was quiet because she didn't want to say the wrong thing. I was quiet because, well, what could I say? What was there to say? Finally, I broke the silence with a stupid question, "What if I liked doing it?" Holly looked at me with her head tilted, confused. "What if I liked fucking you? Then what?"

"Did you?"

"Did you?" I shot back, turning the question around.

"Don't ask me that," she said, very quietly, nearly too quiet for me to hear and I read between the lines. I knew what that meant.

"So now what? Now I can do you anytime I want?"

"What if I said Yes?"

I stared at her with wide eyes. Was she fucking kidding me? "Right. So anytime I feel like getting naked and hard around you, I should just do it?" I asked, stunned by her answer. "And if I want you to suck me or jerk me off or bend over and let me fuck you, that's okay with you?"