I sighed and rolled my eyes dramatically as I stood up, but I knew she’d never do it if I didn’t do it first. Man, this must be really hard on her, I thought. I’d never known she had this problem. How much longer would it have gone on if we hadn’t agreed to do this? What if no one had ever known, and she’d had to live with it her whole life?

Despite everything I had just said, I suddenly found myself a little nervous, because it dawned on me that I had never been naked in front of anyone else, either. Not like this. In a crystal-clear moment of insight, realized that Jen was right: the locker room was different.

I steeled myself. Best to just get it over with.

Like I said, we usually just wore sweats on Saturdays, especially if we didn’t have to go anywhere. Mine were blue, hers gray. She wore socks, I didn’t. Point is, they were comfortable, and easy to put on – and to take off.

The top came off easier than the bottoms. When I hooked my thumbs into them, I paused and reconsidered. There wasn’t really any point to not taking off my underwear too, I realized, and so, taking a breath, I pulled them both down.

Jen said nothing, she just looked. I started to get a little embarrassed because the adrenaline the situation was causing had my dick at, er, “half mast.” I wondered what she was thinking; she’d probably never seen one before. Probably.

This went on for a minute, until my discomfort grew. I cleared my throat. “Well?”

Her eyes snapped up to mine, then she just sort of looked at nothing and nodded. She straightened and put her feet on the floor, then bent down to take her socks off. Then she sat there for a bit, I guess trying to work up the courage. But soon, she came to a decision, and she stood up. Staring up at me with her big brown eyes, she crossed her arms at the waist, and in one smooth motion stripped off her top.

I really can’t say who was having the bigger moment – her, who had never been topless in front of anyone outside gym, or me, who had never seen a pair of breasts before (at least, not in real life). Hers weren’t big, but they were there, just starting to define themselves from the rest of her chest. Her pale, pink nipples were stiff, though whether it was from the chill of being exposed to air or if she was being affected as I was, I couldn’t tell.

She dropped her sweatshirt to the floor, and maintained my gaze. Like me, she simply hooked her thumbs into the waistband of both her bottoms and her panties, and simply slid them down her legs. There before me stood my naked sister. Like her breasts, her hips were just beginning to form. Between her legs I could see a bit of hair, slightly darker than the stuff on her head.

We didn’t say anything for a while, just looked. We were naked, and seeing the other naked for the first time. I admit I was a little turned on, just from seeing a naked girl, but she was my sister, and I couldn’t ignore that.

After those first few moments, abruptly, it wasn’t that big of a deal anymore. We were still the same people we’d always been, the same siblings. I was still her brother, she still my sister. We just weren’t wearing clothes.

Jen seemed to reach a similar conclusion, and at about the same time, because her eyes lost the faraway look and she tilted her head to the side a little as she asked, “So what now?” She wasn’t faking nonchalance, she was genuinely relaxed. Guess my idea had worked.

I shrugged and glanced at the TV. My video game character was frozen in mid-stride, an explosion from an enemy laser blast exploding just to his left. “Can I finish this level, at least?”

She nodded. We sat back down on the couch, and I unpaused my game. She sat on one leg, letting the other dangle off the couch, and leaned over so that her head was on my shoulder. We had done this a thousand times before, only this time, we weren’t wearing clothes. Somehow, it was both thrilling and at the same time did not matter in the slightest. We just sat there, like we usually did. And that’s all it was.

Some time later, when our parents returned and our early warning system kicked in, we scrambled. Jen snatched up her clothes and almost dove into the bathroom (flashing me, I have to admit, a nice view of her ass in the process), shutting the door behind her, while I jumped back into my sweats there in the den. When our parents came upstairs to check on us, nothing was unusual. I was playing my game, Jen was coming out of the bathroom as if she had just had to use it. Mom and Dad never knew.

Jen and I didn’t really talk about what had happened, never really made any acknowledgement of it. I guess we didn’t really feel like we needed to. But we were like that. Our parents often claimed that we could read each others’ minds. It wasn’t anything like that, of course. It was just that we knew each other really well. Obviously we knew better than to tell our parents.

I never mentioned it to anyone at school. In fact, over the next few days, I nearly forgot it had happened. It was weird how not-weird it had been. You’d think hanging out with your younger sister all afternoon in the nude would make you feel weird, but it really didn’t. It was just a thing that had happened, as far as I was concerned.

But I did want to do it again. As natural as it seemed, it had also been kind of thrilling. The thought of being naked with Jen, all alone in the house when Mom and Dad weren’t there had a kind of forbidden, dangerous edge to it. Just a little. Just enough to make it kind of exciting. And I wanted to do it again.

But we didn’t, not for a while. I certainly thought about it, and I knew Jen did, too, just from the glances we’d occasionally send each other. Nothing bad or naughty or anything like that. The look you get from a person when you share a secret; that meeting of the eyes with just a little hint of a smile so no one sees. We didn’t dare do it after we got home from school. While it normally took them an hour and a half to get home, occasionally Mom or Dad would get home a little earlier, or sometimes beat us there if the day had been short or something. We both knew we wanted to wait until we had a better opportunity.

That opportunity finally came on a Friday night, almost two weeks afterwards. Mom and Dad were going out for a date night, which they did from time to time. Some movie neither Jen nor I had any interest in seeing. Pretty sure they were seeing it for that reason (hey, I get it – they need their time to themselves, you know?).

Anyway, Jen and I sent that secret look to each other as they were announcing their plans. We were good kids, like I said, so we hadn’t needed a babysitter in years. We’d have the house to ourselves for several hours while they went to the movie and then to dinner. Tonight. We would have our chance tonight.

Mom and Dad left just as the pizza guy arrived (thin crust pepperoni, the only pie we could ever agree on). We sat at the table and ate in silence, just staring at each other. I don’t know what she was getting from me, but her face was unreadable. Or, at least, I knew what I wanted to see there, I just wasn’t sure I was seeing it. Does that make sense? Anyway, we finished, tossed the rest of the pizza in the fridge, rinsed our dishes in the sink, and then we were just standing there in the kitchen.

Finally, Jen just smiled shyly at me, her hands behind her back and her shoulders rocking back and forth. She bit her lower lip, and just said, simply, “You first.”

I grinned and nodded, and tossed my head towards the stairs. She nodded and followed me up. We were in the clothes we had worn to school that day, jeans and T-shirts, though of course her shirt had that babydoll curve to it that I really liked on girls, because it showed just a little bitty bit of skin at the waist, and her jeans had a bit of 60s-style bell-bottom-like flare. I undressed in much the same way that I had the first time: shirt first, then jeans and underwear in one go.

Jen, on the other hand, had different ideas. Maintaining my gaze with a sly look on her face, she started out the same. She crossed her arms in front of her, and pulled her shirt up. Only this time, she did it a little slower, and she moved her body back and forth, sinuously, as if she were having to work her way out of it.

She dropped it, and then instead of going for her bra, she unfastened her jeans, and pulled down the zipper, watching me the whole time (I’m not sure what my face looked like. If it had been anyone but my sister I would have been drooling). Like her shirt, she shimmied out of her jeans, rocking her hips back and forth. I knew it was the fashion for girls, but her jeans couldn’t have been that tight, could they?

Her bra and panties matched, I remember realizing, once her jeans were a puddle on the floor. Nothing fancy (where would she have gotten something fancy at fourteen?), just white cotton or whatever they make girls’ underwear out of, but obviously part of a set. To my surprise, she turned away, putting her back to me, and then reached behind her to unfasten her bra. She slipped it off her arms and held it in one hand, off to the side, before dropping it on the floor. Finally, she hooked her thumbs into her panties, and slid them down, making sure I had a nice, long view of her butt.

She turned back around, and for a moment, nothing happened. And then, suddenly, for no reason, we started laughing. At the same time, we both smiled, then grinned, then chuckled, and before long we were full-on laughing. I don’t know why.

But it returned things to normal. We sat down on the couch and popped in a movie. She leaned her head on my shoulder and we watched it, again as if everything were normal. Neither of us ever said anything about her little display.

That’s how it went, for months. We would just sometimes strip down and hang out like we always did, only naked. We had a strict policy of never touching the other person anyplace we wouldn’t touch them were we still clothed. Very occasionally, one of us would get bold and ask the other a question about our bodies. Does it always do that? Where did those come from? Isn’t that weird, doesn’t that bother you? Do you think you like it if someone kissed you there? Do you ever… you know? You do? Where? How often?