I smiled into the glass, turning left and right the internal child in me screaming with glee. I mean being Robin wasn't exactly my dream come true of super heroes but it was pretty cool. The level of detail in the costume alone! Best of all, despite being a thirty-three year old dressed as The Boy Wonder, I thought I looked good. It fit me snug, showed off my pecs, my flat stomach, and certainly my biceps. My wife had been all over me until she'd drunk herself into passing out.
She wasn't the only one. Her brother's wife had been all up on me too. I was right at that level of drunk where I was dancing, so I'd had them double for a while. Until Beth had drunk herself into a stupor, once she was in the guest bedroom I'd gone back to drinking. Carlie my lovely sister-in-law insisting I dance with her some more. Which is where I'd been before going to the bathroom. The lovely blonde had been all up against me, it made me shiver with delight. And guilt.
A chuckle escaping me as I glanced around, realizing I was checking myself out in the big front window where they had the snacks and drinks table in front of. Glad it wasn't the back window because that seemed to be where a lot of people were. Filling my sister in law and my cups with sangria I returned to the basement, hitting the wall to let Renee go by up the stairs. Who I'd left dancing with Carlie but now seemed to be arguing with her girlfriend, again. The two of them hissing back and forth as they went by me.
Since it was a basement, and night time, it was dark already. There was no lights on except a single bulb at the bottom of the stairs and a rotating laser ball on the ceiling, further in. Random colors shooting out in tiny beams. The smoke machine was still going, maybe even thicker than before. I stood at the bottom of the stairs staring into nothing but mist and darkness, glowing green, red, or yellow in distant spots from the laser globe.
Thinking herself abandoned Carlie came out of it, stopping as she saw me. My heart jumping in my chest at the sight of her, such a turn on. Maybe not for everyone but the Sexy Star Trek Officer did it for me. TOS style, or close to that. In traditional Halloween style it was much lower cut. The inner nerd was giddy as when I first saw the pretty thirty-seven year old in the black boots and blue dress. It was some stretch material that seemed to want to return to his tiny shape. At some point in the night she stopped pulling down, so now the rather modestly cut dress was very dangerously slutty. Carlie wasn't a small woman; she had some generous hips, long full legs, a rather juicy butt, and equally ample tits. That the tight dress showed off well. Oh did I mention the vulcan ears? No, well she had vulcan ears rather expertly applied, not the plastic ones of a totally fake color.
We sort of stood there kinda swaying to the music and drinking. Not exactly being very subtle about checking each other out, not exactly dancing. The slightly older blonde giving me a pleased smile as she finished her drink. Tipping it in my direction like it had been a race, taking mine from me before I got more than a big gulp in to try and catch up. Finishing it as well, it was strangely pleasing to have her so easily drinking out of my glass. Slipping into the fog I realized we were alone down here. Not a lot of people had wanted to dance to begin with, now it was just us.
"I think we're all alone down here." The energy was different even before she said that upon recognizing it as well, but it certainly dialed it up.
"Yeah, I think we are." It was a slow song, my hand was already half on her big butt. It wasn't crossing a huge line to let it slide down more, till I was full on groping it.
"Just because we're alone it gives you permission to do that?" Since we stood more or less right under the laser globe there was always some light on us, of one color or another. So I could see her smirk in our lonely world of mist. "My husband wouldn't like that."
"He wouldn't have liked how you were rubbing it up against my cock earlier either." We'd had this teasing conversation once already, only I hadn't said what she'd been rubbing against.
"No, he wouldn't. Especially not since I got it ard." I didn't correct her, it had certainly stiffened up, I mean that fucking dress had rolled up and I'd been rubbing my thin green material (sans underwear) covered crotch right up against her black panties. "He really wouldn't like it because it was bigger than his."
I wanted to tell her that I wasn't even half hard yet either, but that felt petty. Plus she was stroking my biceps, tracing my pecs, and already seemed impressed enough. Her smile brightened when the slow song ended, a much bassier club song beginning. We immediately shifted into it. Touching each other, rubbing against each other, really no differently than we had when my wife and everyone was else was nearby. Until there came "drop it low" part to the song, and my wife's brother's wife dropped it low. Coming back up, the dress a bit higher from how she'd squatted to get so low. Only instead of black panties covering the inner part of her peeking butt, there was just pale flesh.
She did blush when she saw me seeing it. I don't think she'd intended it as a sexy seduction thing. It was warm down here, despite the lateness of the year. Warmer after so much dancing. Maybe she had but just got a hiccup of worry from her boldness. Either way after the moments of us realization, I pulled it the rest of the way up.
I shouldn't have. I know. I should have been more subtle or seductive about it, but I couldn't help myself. I was buzzing pretty hard, even more 'drunk' on the kinkiness of dancing all night with my married sexy sister in law. While she bit her bottom lip, knowing this was wrong and stupid, she didn't fix it. Just kept dancing up against me.
Thirty seconds later she was facing me, since she was shorter she wasn't rubbing her pussy right to my cock but she was trying. Trying while running her hands down the back of my Robin tights,double cupping my ass. Using it for leverage to pull me against her bare pussy. One that was covered sparsely in blond brown hair, like she'd had it shaved a couple weeks ago and hadn't gotten around to it lately. Blue eyes locked on mine as she felt me growing harder in the thin covering of my tights, her pretty face changing colors in the light globe.
