When My Wife Offered Me a Night with Her Sister

The cruise through the Mediterranean was Lorena’s idea, my wife’s. We had spent months planning it: a week on a ship, her, me, and the boys. At the last minute, Carolina, her sister, joined us; she was going through a rough patch and, according to Lorena, needed “a little air.” I didn’t object. Carolina had always stirred a silent tension in me that I had learned to keep to myself without really knowing where it came from.

The ship was enormous. We took two adjoining cabins: ours and Carolina’s, since she was traveling alone. The first few days passed between pools, dinners, and cold white wine. The two sisters laughed together, shared memories, disappeared along the deck for hours. I watched both of them. So different and yet so complementary.

Lorena had the kind of body I had always been drawn to: generous curves, fair skin, a big, expressive mouth. Carolina was her opposite in almost everything: thin, dark, with light eyes that contrasted with her darker complexion. Where Lorena was soft and rounded, Carolina was angular and restless. Both of them made me equally tense, though for different reasons.

From the very first day I slept with Lorena. Even when she came back tired at night, the moment I touched her in the darkness of the cabin something in her gave way, and we ended up tangled in the sheets until late. It was part of the ritual, and I liked it. I liked sliding my hand between her legs and feeling her open for me, feeling her go wet instantly when I brushed her clit with two fingers. I liked kissing her breasts, biting her nipples until they went hard and she arched her back, with that low moan that always turned me on more than I admitted. I fucked her slowly at first, feeling how she adjusted to my cock, then harder, until she ended up clutching the sheets with her legs spread and her breathing wrecked. Sometimes she came first; sometimes I got there with her, buried in her to the hilt, my hips hammering her ass and the bed creaking beneath us. It was a delicious habit, a way of falling asleep with my body still hot and my mouth full of her taste.

***

On the fifth day of the trip, in the middle of the afternoon, Lorena sat on the edge of the bed while I was reading. She had that look she got when she wanted to tell me something but didn’t know how to start.

—Carolina is really tense —she said at last—. She hasn’t gone out with anyone in months. I think she needs something.

I closed the book and looked at her.

—Are you asking me what I think you’re asking me?

—I know you like her. I don’t mind admitting it. —Lorena raised one eyebrow—. I’ll stay with the boys tonight. You sort things out with her.

I didn’t know what to say. I stayed quiet for a moment, waiting for her to add something, to take the offer back, to say it was a test. But Lorena got up, grabbed her bag, and walked out of the cabin as if she had just suggested I go to the bar aft.

I spent the next hour unable to think about anything else. I imagined Carolina’s face when she realized Lorena was giving us free rein, the edge in those light eyes of hers looking at me with that mix of challenge and hunger that had always made me hard. I touched myself through my pants just to take the edge off, and still my cock kept throbbing as if it already knew what was coming.

***

At ten at night I knocked on Carolina’s door. She opened it in lingerie, a black lace set that did not look chosen by chance. If Lorena had told her anything, Carolina had prepared herself.

—I see Lorena talked —I said.

—Yes. —She looked straight into my eyes, not taking them off me—. Are you coming in, or are you going to leave me standing here with the door open all night?

I went in. I closed the door. I took her by the waist and kissed her. It was the first time I had kissed her, and her mouth was everything I had imagined: big, full, warm. Carolina responded without hesitation, her hands at the back of my neck, pressing my head against hers as if she had been waiting for this moment for weeks. I slipped one strap of the lace down and licked her neck, then her jaw, feeling her pulse racing beneath my tongue.

I took her to the bed. I removed her bra without hurry and slid her underwear aside. She was wet before I had done anything. I spread her thighs with one hand and knelt between them. The smell of sex hit immediately, dense, hot. I licked her slowly, first around, making her writhe while I avoided the center. Then I pressed my tongue against her cunt, firm, insistent, until she let out a rough moan and dug her fingers into my hair. I opened her lips wider with my mouth and started working her clit patiently, licking, sucking, alternating pressure and pauses, until her whole body tightened and her legs trembled against my cheeks.

—Please —she said in a hoarse whisper—. Now. Please.

I didn’t need any more instructions.

I pulled down my clothes, took out my hard, hot cock, and climbed back over her. I ran the tip along her entrance, soaking it with her own juices, and pushed in slowly. I felt her give, felt her opening as I went deeper. Carolina inhaled sharply, threw her head back, and grabbed my shoulders. I drove into her in short strokes, controlling the pace until she stopped tensing up and started coming to meet me too, moving her hips against mine.

It was brief, intense, and to the point. Carolina sank her nails into my back and closed her eyes. I rammed into her deeper and deeper, hearing her moan through clenched teeth, feeling her walls clamp down on my dick with a force that nearly made me lose control. We came almost at the same time, her lips smothering a cry against my shoulder while I came inside her, hot and thick, with a shudder that ran from my thighs all the way to the back of my neck.

Afterward, when the silence of the cabin settled, Carolina looked at me and smiled.

—Now go sleep with your wife. I’m fine now.

***

The next day, at breakfast, I arrived a little later than they did. I found them on the dining terrace, with coffee and fruit. When they saw me, Carolina lowered her gaze to her cup and smiled to herself. Lorena greeted me with a wide smile.

—You slept well —she said. It wasn’t a question.

—Very well —I admitted, pouring myself coffee.

—Tonight —Lorena said with that cool calm of hers—, it’s my turn. And I want you to take me from behind.

Carolina looked up. She looked at both of us.

—From behind? Really? —She frowned—. Doesn’t that hurt?

—Depends how they do it —I answered.

—I tried it once —Carolina said, lowering her voice even though no one was nearby—. It was horrible. I had to ask him to stop.

—With time and the right lubricant, it shouldn’t hurt —I said—. If it’s done right, it’s the opposite.

—That’s what he says —Lorena interjected—, and he’s right. It took me a while to learn, but now sometimes I ask him to be rougher.

Carolina looked at them both with a mixture of disbelief and curiosity she couldn’t quite hide.

—I don’t believe you —she said at last.

—I could prove it to you —I said, without having fully thought through the consequences.

The silence that followed was very eloquent.

***

That afternoon the three of us went to the ship’s sex shop, a small place between the games room and the casino. I bought lubricant. Lorena and Carolina browsed the display cases with the same attitude they would have had in a pharmacy: weighing options, reading labels.

I saw the moment Carolina stopped in front of a side display. Inside there was a black leather harness with a latex dildo attached at the waist, huge, with considerable girth. Carolina looked at it for several seconds without saying anything. Lorena watched her out of the corner of her eye, amused, as if she were reading a thought Carolina didn’t want to admit.

—Thinking about someone? —I asked, coming closer.

She blushed and looked away.

—I was wondering what it feels like —she murmured—. To have it, I mean.

—If you want, you can rent it —I said.

—Don’t be ridiculous —she answered, though she kept looking at it a moment longer before walking away.

The walk left me thinking. The three of us were at that threshold where anything seemed possible if someone said it out loud. I decided to say it.

—I have a condition —I announced when we left the shop—. If you want us to do what we talked about at breakfast tonight, I need something in return.

Lorena crossed her arms.

—What kind of condition?

—That you kiss. And more. The two of you.

Lorena opened her mouth to say something, but Carolina cut in:

—Lorena, it’s not that much. If that makes him happy, what do we lose?

Lorena looked at me with that expression that mixes irritation with complicit resignation.

—You’re a freeloader —she said.

—Yes —I admitted—. So?

—All right —she gave in—. But know I’m going to make you pay for it.

I didn’t fully understand the comment at the time.

***

That night Carolina came to our cabin. I asked them to start off just the two of them. They looked at each other, shrugged, and kissed slowly, with more naturalness than I would have expected. The contrast between them —Lorena’s fair skin against Carolina’s darker one, their different heights, their big mouths pressed together— was enough to make me lose my calm. I watched their hands moving over each other’s bodies, testing, squeezing breasts, sliding down their waists until they touched between their legs. Lorena gasped when Carolina slipped two fingers beneath her panties, and Carolina answered by leaning in to kiss her mouth with even more hunger. I was already hard, feeling the blood pounding in my cock with every passing second.

I laid Carolina on her side on the bed. I positioned myself behind her and, while Lorena settled in front of her to keep working her mouth, I began to lube her up very carefully. One finger. Then two. Slowly, in circles, without forcing it. Carolina moaned with Lorena’s mouth on her, and the sounds mixed until it was impossible to tell where one ended and the other began. Lorena licked Carolina’s nipples and then bit one areola with a cruel tenderness that made her arch. I kept opening her with my fingers, going in and out slowly, until her ass relaxed enough to ask me for more with her breathing.

—I’m ready —Carolina said, her voice thick—. I can’t take it anymore.

I lifted her leg slightly, set the tip against the hole, and pushed gently. The head went in. Carolina made a sound halfway between a moan and a whimper, and I stopped.

—Do you want me to stop?

—No. —She took a deep breath—. Keep going. Slowly.

I went all the way in with three slow movements. Carolina twisted forward, seeking her sister’s mouth, and Lorena held her. I started moving, first unhurriedly, then with more rhythm. Lorena lowered her head between Carolina’s legs and added her tongue to everything that was already happening, sucking her cunt until Carolina started trembling hard. I fucked her from behind, feeling the ring clamp my cock with every thrust, hearing her nails rake the sheets and her moans get dirtier, more desperate.

—Oh my God —Carolina babbled—. I can’t anymore. I can’t anymore.

She came in a long shudder, with Lorena holding her from below and me thrusting from behind. I came a moment later, unable to hold back, spilling with a hot pulse that left me shaking inside her.

***

Then it was Lorena’s turn. She asked me not to warm her up too much. I knew that side of her well: she liked to feel the edge, to know it was going to hurt a little. I understood that logic even if I didn’t always share it.

—Carolina, hold my hands —Lorena asked while she lay on her side—. That way I won’t move.

I applied the lubricant and went in at once, without the patience I had shown Carolina.

—Ow! —Lorena screamed—. It hurts! Take it out!

I gripped her hips hard. Carolina held her hands.

—I’m not taking it out —I whispered in her ear—. That’s what you wanted.

—You son of a bitch! —she muttered, half laughing, half crying.

Little by little her body yielded. The screams turned into moans and the moans into instructions.

—Harder —she said—. More. And you, Carolina, lower.

Carolina obeyed without hesitation. Between the two of us we took Lorena to the limit, and she ended up with a muffled scream against the pillow, trembling as the cock drove into her depths over and over until she was completely emptied out and spent.

That night the three of us fell asleep in the same cabin, without bothering to return to our respective rooms.

***

The next day, during lunch, Lorena and Carolina kept looking at me with a smile I couldn’t quite decipher. They spoke to each other in low voices. They laughed about something that was clearly about me.

—What’s going on? —I asked.

—Nothing —said Lorena—. Did you enjoy last night?

—Very much —I answered.

—Good —Carolina said—. Because tonight it’s your turn to receive.

I didn’t understand what she meant. Lorena added:

—You said it doesn’t hurt if it’s done right. Let’s check whether you were right.

Something in the tone of both women made me feel I should be worried.

***

That night Lorena asked me to go to Carolina’s cabin blindfolded. She said there was a surprise. I agreed, thinking I had a rough idea of what was waiting for me.

I knew nothing.

The moment I stepped inside, Lorena kissed me and Carolina took me by the neck. The two of them worked together with coordination they had clearly practiced. When I tried to react, my wrists were already handcuffed to the headboard and my ankles tied to the bed frame. Face down, naked, completely immobilized.

—Good evening, brother-in-law —Carolina’s voice said from somewhere behind me.

Lorena took off my blindfold. I turned as far as I could and saw Carolina with the black harness from the sex shop strapped around her waist, the latex dildo pointing forward. They had bought it. At that moment the details mattered very little to me.

—You said if it’s done right, it doesn’t hurt —Carolina said with a very calm smile—. Let’s see.

—Wait —I said—. This is a joke, right? Untie me.

—In your dreams —Lorena replied, folding her arms—. I want to see you beg me to take it out.

—And the more you ask, the deeper I’ll put it in —Carolina added.

I understood there was no room for negotiation.

Carolina moved behind me and began to lube me up calmly, unhurriedly, with the same attention I had given her the night before. One finger. Then another. Lorena sat on the edge of the bed, watching me with an expression that was half amused, half focused.

It hurt when the head of the dildo went in. I bit my lip and closed my eyes. I decided I wasn’t going to give them the pleasure of hearing me beg.

—Does it hurt? —Lorena asked.

—Not at all —I lied.

—How brave —Carolina said, and pushed a little farther.

I did what I remembered having read somewhere: I relaxed my muscles, breathed slowly, let the body give way instead of resisting. The pain turned into something more diffuse, more ambiguous. Carolina found a rhythm and I stopped being sure whether what I felt was discomfort or pleasure. Lorena leaned over me and started kissing my chest, then my stomach, then the tip of my cock, sucking me with obscene calm while the harness kept sliding in and out from behind. The sensation of those two things at once left me breathless. I felt my cock harden even more under Lorena’s mouth, and the pressure in the back became unbearable, delicious, exact.

—More —I said, without having planned to say it.

Carolina stopped for a second, surprised.

—More? —she repeated.

—More —I confirmed.

Lorena slid beneath me without saying anything and started working with her mouth. Carolina resumed with more force. Between the two of them they took me to a point where I lost control of any coherent thought. Lorena sucked my cock with her lips wide open, her tongue firm at the base of the glans, while Carolina fucked me from behind with a rhythm that grew deeper and deeper. My body burned, my head swam, and the only thing I could do was tug at the cuffs and endure.

—I’m going to come —I warned, my voice breaking.

—Me too —Carolina gasped from behind—. Lorena, don’t stop.

The three of us came almost at the same time, in a chain of spasms that took several seconds to settle. I felt the semen rush up violently and spill between Lorena’s lips, while from behind the final thrust tore a groan from me that almost became a scream. My whole body was left trembling, ruined and happy.

***

When Carolina removed the harness and Lorena came out from underneath me, the three of us stayed silent for a long time, breathing. None of us had much to say.

At last, Carolina broke the silence:

—Well? Were you right or not?

It took me a while to answer.

—Depends how it’s done —I admitted.

Lorena burst out laughing. Carolina did too. It took me a moment longer, but in the end I laughed as well.

The three of us fell asleep in that narrow cabin, without bothering to tidy anything up or explain anything. There were four days left of the cruise. None of the three of us said out loud what all three of us were thinking: those four days were going to be very interesting.