Cruise With Sis
Copyright© 2026 by Axad Artin
Chapter 6
Action/Adventure Sex Story: Chapter 6 - Getting dumped by girlfriend on a cruise is usually a terrible thing to happen. But his sister suffered the same and things weren't bad at all anymore.
Caution: This Action/Adventure Sex Story contains strong sexual content, including Ma/Fa Consensual Fiction Cheating Incest Brother Sister Oral Sex
Sunday, near Miami
I groaned when the alarm went off at seven. I realized that I hadn’t set it back to a more reasonable hour when the docking got delayed.
“Come on, everyone,” said Caitlynne. “Bathroom break, then we need to talk.”
We took turns going to the bathroom. Karen and I got back into bed, and Caitlynne stayed out.
“Okay,” said Caitlynne. “Certain things about this cruise are never to be mentioned again. Those things include that Thomas and I were lovers and that Karen had a fling with James. Agreed?” While Caitlynne was saying this, she had taken off her nightshirt and was nude in front of us. She apparently didn’t feel the need for modesty after last night.
“Agreed,” Karen and I said as Caitlynne reached for her bra.
“We need to decide what we’re going to tell people about the cruise, and we all have to say the same thing.”
“I’m not comfortable lying to people,” said Karen. “Being less than honest is what got me into trouble.”
“We aren’t going to lie to people. We’re deciding how much of the truth they can handle. For the most part, we’re going to tell people that the cruise was emotionally wrenching with lots of painful moments, so we don’t want to talk about it. Fair description?” Caitlynne continued dressing as she talked.
“Fair,” said Karen.
“Okay. I think we have to tell people that you two broke up on Monday. You two broke up because of lots of little things that had accumulated. What was the straw that broke the camel’s back?”
There was a pause as Caitlynne waited for Karen or me to provide her with a reason.
“Because I asked Karen to move in with me again.”
“Did it bother you, Karen, when he asked you to move in with him?”
“Yes. I don’t like being pressured.”
“Okay. Did he ask you on the cruise?” Karen and I shook our heads no. “But it was something that primed you to jump to James when he showed up?”
“Yes.”
“Then close enough.” Caitlynne had finished dressing. “So Monday, you two break up but stay friends. The rest of the week, we’ll keep it vague. One thing we’re going to have to fudge is excursions. We’re going to have to imply that we did the excursions together. Thomas, you’ll have to give Karen the details of the excursions we went on and she didn’t so that she can describe them to people like we do.”
“Let’s change Jamaica to horseback riding on the beach,” said Karen. “I loved that and want to tell people about it.”
“Fine. You come up with the details for the horseback riding and teach it to me later. Moving on. I think we’re going to have to fudge how James and I broke up. I think we need to imply that it happened later in the week. Let’s say that he constantly antagonized Thomas and that was the final straw for me. Okay so far?”
“Yes,” Karen and I said.
“Wrapping up. Saturday night, I sat you two down and knocked some sense into you. Karen, you agreed to move in with Thomas. Thomas, you agreed to ... Thomas, you have to agree to something. You’re getting back together won’t make sense unless you give Karen something.”
“I agreed to go to church with her every Sunday if we can find a church that we both like.”
Karen’s eyes went wide. “Thomas, you would do that for me?”
“Yes. I’ve been kicking myself since Monday for not proposing that months ago.”
“Oh, Thomas! I love you!” Karen showered my face with little kisses.
“You two can continue that in a little bit,” said Caitlynne with a smile. “Let’s finish up now. Thomas agreed to go to church with Karen if you can find a church you both like. Karen agreed to move in with Thomas. You kissed and made up. That I was in the room when you made love is one of those things to never be mentioned again. Any questions?”
Karen and I said nothing.
“We’ll run through it again when I get back. I’ll go look for James. I’ll tell him that you two are back together. I’ll get your stuff out of his cabin so you don’t have to deal with that sleazeball again. I’ll tell him that if a whisper gets back to any of Karen’s friends that something happened between him and Karen on this cruise, I’ll kick his ass up and down the street in front of his damn truck stop.” Caitlynne gave us a smile that left no doubt that she would enjoy doing that. “Okay, I’m off. I’ll be gone long enough for you two to make love again. There’s nothing like a slow morning fuck.”
Karen opened and shut her mouth several times. “I’m not ready...”
Caitlynne gave her a “haven’t you learned anything” look.
Karen moved her hand in front of herself like she was wiping out her last statement. “Look, you told me last night that I need to do whatever it takes to keep Thomas happy. You told me that I need to up my game in bed. I agree, but I don’t know anything about sex. The tips you gave me last night were helpful, but aren’t nearly enough.”
Karen stopped there. I expected her to continue. I looked at Caitlynne, and she had a confused look on her face.
“And so?” asked Caitlynne.
“And so, I want an in-depth sex lesson. Something more than the tips you can give while watching Thomas and me.”
Again, Caitlynne looked as confused as I felt. “And that would be?” asked Caitlynne.
“That would be that you and Thomas make love while I watch, and you explain to me what you’re doing and why.”
I was floored.
“You want me to make love to Thomas in front of you?”
“Yes. I know it sounds crazy. Before I came back, you were going to make love this morning, then go back to being a normal brother and sister. I’m asking you to stick to that plan. I’m not ready to make love, and you are. It will make Thomas happy, and I’ll learn how to keep him happy. So many things have happened on this cruise that I’ll never discuss with anyone. What’s one more?”
Caitlynne looked at me, then back at Karen, then back at me. She was as stunned by Karen’s idea as I was. “Thomas, what do you think?”
“I’ve had a great time with you, but I know it has to end. I think it would be a nice way to end it.”
“It would be a nice way to end it. I’m game.”
Caitlynne emptied her pockets, quickly stripped, climbed onto the bed, and pulled the covers down. “Anything in particular you want to see?” she asked Karen.
“Different positions. Ideas for more variety. Whatever will make it better for Thomas.”
“And better for you. The more you enjoy sex, the more Thomas will enjoy having sex with you.” As Caitlynne flopped on her back, I got on one side of the bed as Karen got on the other. “Do you mind if Thomas and I kiss?”
“No. Act like I didn’t come back last night. Make it the best you can for Thomas.”
“You continue to amaze me, Karen.” Caitlynne turned to me. “Are you ready to give her a good show?” Caitlynne pulled me down for a kiss. “You’re going to have to rev me up. I was steeling myself to confront James, and I’m not in the mood for sex yet.”
I kissed Caitlynne repeatedly as I rubbed my hands all over her body. “You have such a beautiful body, Caitlynne. I’m going to miss it.”
“I’m going to miss you, Thomas. You’re a great lover.”
I kissed her hard, then slid my tongue into her mouth. Our tongues battled for a little while. I stopped roaming with my hand and instead concentrated on her tits. Her nipples were hard between my fingers as I played with them. She was definitely getting revved up. I slid my hand down from her tits, then back and forth across her rib cage and stomach. When my hand reached her small line of crotch hair, Caitlynne raised her crotch to meet it while fucking my mouth with her tongue.
Caitlynne let me make a few circles around her clit, then pushed me back and turned towards Karen. “You like sexy games. Here’s one. Thomas, get between my legs.” I moved into the missionary position. “Now slide a little further down until the bottom of your stomach is where my clit is. Good. Now rub your body against mine in a fucking motion.”
I pressed my lower stomach against Caitlynne’s crotch, then slid upwards using the same motion as fucking in the missionary position. Caitlynne lifted and pressed her crotch against me as I slid up. When I moved back to my starting position, Caitlynne dropped her crotch back down.
“That’s it, Thomas. Lots of pressure against my clit. That feels so good.”
As I slid upwards, my hard cock made a beeline for her pussy. I needed to slide only a little more forward, and I would be in. A long, steady stroke, then back to our starting position. A long, steady stroke, then back to our starting position. Being so close to fucking but stopping short made this game very exciting. Is this how we were going to start fucking?
“That’s enough, Thomas. Come back up here and finger me.”
I got on the bed to the right of Caitlynne and moved my right hand to her crotch. I slipped a finger between her pussy lips and began working it up and down her slit. Caitlynne turned towards Karen.
“Like you, I prefer to be eaten, but I mix in occasionally being fingered so it won’t be the same old, same old.” She turned to me. “I don’t think it will take you long. Last night, I got so hot watching you and Karen fuck while I advised. I felt like I was a part of the action.”
Caitlynne wrapped her hand around my cock, giving it a quick pump up and down, then dropped her hand down to my balls and gave them a light tickle. She turned back to Karen.
“It’s a good idea to play with Thomas’ privates while he’s fingering you so he’ll be ready when you’re ready. Could you do that for me?”
“Sure,” said Karen as she hopped off the bed, then got back on behind me. I was on my side, tilted slightly away from Caitlynne so her hand could play with my balls. Caitlynne removed her hand.
“What should I do?” asked Karen.
“Play with his cock and balls,” replied Caitlynne. “Nibble on his neck. Whatever he likes. Don’t get him too excited, but keep him hard.”
Karen wrapped her right hand around my cock. Her hand was much smaller than Caitlynne’s and a little colder. She slowly pulled her hand up the length of my cock while rubbing her tits across my exposed right side.
“Do you like that?” she whispered huskily to me.
“Yes,” I said in my normal voice.
“Do you like the hand or the tits?” she whispered. Her hand was making its way slowly down my cock.
“Both.”
Karen stopped with the tit rubbing and instead kissed lightly down my right arm. Her right hand dropped down to my balls and cupped them.
“Do you like this?” she whispered. Her sexy whispers were driving me wild.
“I prefer a light tickle.”
“Like this?” She gave my balls a soft tickle.
“God, yes.”