It was evening time, and my girlfriend Megan and I were riding in the back seat of my friend Jeff's car. He was driving, and Anthony, another mutual friend of ours was in the passenger seat. An acquaintance was out of town, it was winter in a cold place, and we were all helping out with looking over the house while they were gone. The place had a great living room, and we decided it would be fun to have a few drinks and watch some movies from their huge sectional couch.
The house was a reasonable distance from the nearest place to buy alcohol, so we had about a 30 minute ride on the way back. Me and my friends were idly chatting about video games, snowmachines, and the shit we had gotten up to last weekend. The usually type of conversation you'd expect a group of 20-something dudes to have. My girlfriend was sitting there with her head on my shoulder, and would throw in a word occasionally. We had all gone to high school together, I had been friends with Jeff and Anthony forever, and Megan and I had gotten together late in our Junior year.
Megan and I were both quiet people, but quickly when we started dated we discovered that we shared some kinks. One of those was voyeurism - we both were hugely turned on by having sex in risky places. She had teased me a bit earlier in the day while we were still back at the house. Anthony hadn't arrived yet, and Jess had gone to the bathroom. As soon as we were alone she came up to me and pulled me into a deep kiss, causing a quick semi-hardon. She noticed this, and started rubbing it through my jeans. Not to be outdone I started groping at her breasts, unbuttoning the top button on her shirt in the process. We stopped before Jeff came back out, but she forgot to redo that button. It took her a while to notice, and the only reason she did is because he couldn't keep his eyes away from them.
With some tension already built up from earlier I couldn't resist teasing her now. I had my arm around her already, and I started running my hand up and down her shoulder and back.
"It was sick when we got that prowler on that mountain and started shooting down at those guys," Jeff said.
"Yeah man, that was a good call, our KD went insane doing that," I said, sliding my hand back up Megan's side, intentionally brushing against her breast as I did.
"Too bad I missed it" said Anthony, "Couldn't get away from work."
"Your boss is a prick, he always calls you in on the weekend," I replied, my arm still wrapped around Megan, but with my hand now cupping one of her tits from underneath.
My efforts were clearly having an effect, because as I started to rub my fingertips across her nipple I felt it getting hard through her clothes. She had fallen completely out of the conversation, and put her mouth near my ear and gasped softly.
"Yeah... He really is," Anthony says, "I've got to find a less shitty job."
A good song must've come on, because the conversation hit a lull at that point. Megan had done nothing to stop me at this point, and I was going to keep pushing further. I took my arm back from around her, and put my hand on her knee.
Her head still resting on my shoulder, I started sliding my hand back and forth on top of her thigh. She was sitting pressed against me, with her legs together, so after a couple strokes I moved my hand down to be inbetween her knees and gently spread her legs ever so slightly, hearing another slight gasp in my ear as I did.
I ran my hand back and forth over her inner thigh a couple times, going up a little further each time. Gradually I transitioned from rubbing her thigh to rubbing her pussy through her pants. I could feel the heat coming off her, even through all the clothes, and I could tell she was struggling to remain quiet. She did manage to regain enough composure at one point to reach over and try to return the favor, I was already painfully erect and feeling that didn't seem to do much to calm her down.
We had broached the topic of group play before, and at this point my dick was doing all the thinking. I whispered into her ear "do you want to suck on it?"
She nodded eagerly in response.