Marketa: My Twin Sister and Me
Copyright© 2026 by Marc Morven
Chapter 1: Marketa
Incest Sex Story: Chapter 1: Marketa - Marc and Marketa are twenty-three-year-old fraternal twins who have always shared an unusually close bond. Born in the Czech Republic and adopted by an American mother, they are now attending different colleges and beginning to lead increasingly separate lives. Marketa is beautiful, outgoing in everyday life, but deeply inexperienced and insecure when it comes to intimacy. After struggling to become comfortable with men, she turns to the person she trusts most: her twin brother.
Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa Consensual Heterosexual School Brother Sister Oral Sex
I have a problem.
A pretty big problem, actually, and I have no idea how I’m supposed to solve it, because whatever I do feels like the worst decision in the world.
I’ll get straight to the problem first, and then I’ll try to make sense of it.
My name is Marc, I’m twenty-three, and my twin sister, Marketa, who’s also twenty-three, has proposed something to me: she wants us to go for a drive so she can suck my cock.
Obviously, it’s not that my sister is some kind of sexual deviant, and she didn’t put it to me quite that bluntly. In fact, that’s exactly the problem. Marketa is incredibly shy, and guys make her nervous. Well, maybe I’m exaggerating. It’s not that she’s actually afraid of guys; it’s just that doing certain things with them scares her. She just explained to me that she’s given handjobs before, but when it comes to going any further, she freezes up. That’s why she’s asking me for help.
Obviously, it’s a terrible idea. The problem is that whatever I do, I’m going to feel awful. If I refuse, I’ll feel terrible because my twin sister is asking me for a favor and I’ll literally be telling her no, despite how close we are. But if I agree ... I don’t know. She’s my little sister. Sure, she’s only my little sister by a few minutes because we’re twins, and yes, she’s twenty-three years old, not a kid, but still...
The thing is, I understand her.
I suppose that’s the worst part.
The real problem probably goes back to our mother’s work, but I’ll take this one step at a time.
As I said, my name is Marc. I’m twenty-three, dark-haired, tall, and good-looking. I’m in great shape, my abs show, and girls at college tend to like me. I don’t want to sound arrogant, but it’s true. Unlike my sister, I’ve had plenty of sexual relationships, some of them with friends of hers, and everything has always gone fine.
Marketa, my twin sister, is twenty-three and was born a few minutes after me. She’s dark-haired too, incredibly beautiful, funny, and although it feels strange talking about her body, the simplest way to put it is that she’s slim and gorgeous. We both have Czech roots because we were born in the Czech Republic before being adopted by our American mother.
Our mom, Jessa, is your classic successful American. She owns several restaurants across the country, which meant we had to travel quite a lot when we were younger, although we’re both at college now.
I live on a coed college campus, surrounded by both guys and girls. My sister’s campus is a completely different story. Since she’s studying fashion, women vastly outnumber men there, and according to her, most of the few guys she does meet happen to be gay.
We haven’t been seeing as much of each other lately, which I suppose partly explains her proposal.
Anyway, I ran into her at college today. That happens sometimes, so there was nothing unusual about it, except she looked worried—or perhaps thoughtful would be more accurate.
“Bro, can we talk for a second?” Marketa asked.
“Sure.” I let my friends carry on without me and stayed behind with her to find out what she wanted. She sighed, looking as though she didn’t quite know how to say it.
“Don’t worry, nothing’s wrong. But I’m going to text you this afternoon because I want to ask you something, okay? I’m just warning you now so you know it’s really me,” she said with a smile.
“Okay, sis.”
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