My younger sister had moved in with me. She had dumped her boyfriend, and my roommate had left a month earlier to "find himself." Carrie was only a year and a half younger than me. As kids we'd hang out together when we weren't fighting.
"Matt, can you give me a ride to the laundromat Saturday?"
"Sure. Just remind me Friday."
Carrie joined me in the kitchen. "Thanks," she said, kissing me on the cheek. Her long brown hair was pulled back into pigtails, reminding me of her as a little kid. But she was no little kid now. Had I not been her brother I would've really loved the midriff and tight jeans she wearing. I knew she was beautiful. I also knew she was sexy, but mainly because so many guys told me so. Guys I watched carefully. Big brothers do that.
We ate the linguini I made. She told me her ideas about "livening up the place." I nodded blankly, knowing she'd have her way even if I said no. After we washed the dishes, Carrie said she was tired, kissed me on the cheek, and headed upstairs to her room.
I grabbed a cup of soda and sprawled out on the couch. I turned on the television and after a couple hours was extremely relaxed. There was nothing good on, so I flipped through the channels. I found some low-budget beach bimbo movie. The women weren't that pretty, and their boobs were impossibly huge. But some of the scenes were hot, especially the two girls kissing and fondling.
Watching this scene made my erection grow very fast. I pulled my shirt off, then my pants. I rubbed my dick through my underwear, but I was already so horny I quickly yanked them off. Wrapping my fingers around my erection I slid my hand up and down. I let loose a long sigh as I started masturbating. I ignored the TV, interested only in jacking off. I looked forward to shooting my load on my chest and belly, but making it take a long time.
A long moan escaped my lips. I could see my glans disappear into my fist and emerge from it. Then I started to lightly rub my balls. Oh, god, I was really loving this. It was good to live alone.
Then I heard a sound in the kitchen. Reality set in. I was so used to being alone, I'd forgotten Carrie had moved in! I was frozen in fear for a few seconds. My mind raced. I reached for my underwear, but she was already in the doorway. She just stood there. I sat up fast, holding my underwear over my crotch.
"Oh, shit, sis! I'm sorry. I – Damn. I just, well—"
"Matt, Matt, quiet. No prob. You just forgot I was here."
I sighed and covered my face with my free hand. "Yeah. I was so comfortable and… Shit. I'm so embarrassed, Carrie."
"Why? Because you masturbate? Who doesn't?"
"Spare me the speech about it being natural. Most don't get caught."
She laughed a little. "OK, yeah. But it's not like I don't play with myself, too, bro. No big deal. And, um, by the way, you're still sticking out."
I realized I hadn't done a good job of hiding myself. My free hand pulled my underwear to hide my penis. "As long as you understand."
"What a pair. Me in a tank top and panties, you holding a pair of briefs. Talking about masturbation." It was a rather strange scene. I had to smile. "And, um, bro?"
"Yeah?"
"Speaking of which, aren't you going to finish? You didn't come. Don't want you to feel like you can't pleasure yourself because of me." But I had to admit to her I had kind of lost the moment. "What if we do it together? Would that help?"
"Carrie, don't even kid around like that."
"Kid around, hell. I was watching you. Seeing someone masturbate is erotic. Brother or not, you're a handsome guy with a great body. And now I know, a great cock, too. I
liked
watching."
At that point it was obvious again how similar we were. "Well, I have to admit I've checked you out, too. You're a sexy girl, Carrie. And… sometimes… when I jack off I think of you masturbating, too."
She laughed and sat down in the chair next to me. "Oh, bro, if we confessed that we'd fantasized about each other whacking off. We could've had so much fun growing up. And those camping trips!"