continued to graze along her ass, but now I let them move downwards along her thigh. I knew I should stop myself, but I couldn't. She was too beautiful. My cock was too hard. It had been too long since I’d had sex, which was something I still blamed Meg for, whether that was a valid complaint or not. My palm slid around her thigh just above her panties and then I moved it up again. I felt her tense along me once more and then my index finger made contact with her pussy lips and she jumped slightly in response.
As she did, I slipped it up a bit higher and when she settled back down it caused my finger to push between her lips slightly. Oh my! Meg was actually as wet as I was hard.
"What the hell is this?" I asked, pressing my finger harder against her, pushing deeper into her folds. "Is this turning you on?"
Meg gasped against my intrusion, wiggling her hips a bit. Whether it was to get me to continue or to stop, I wasn't sure. "You are a nasty girl, sis," I said. I lifted my hand up and slapped her ass again, but not quite as hard this time. I then squeezed it and let my finger slide between her cheeks again, back down to her wetness.
This time she wiggled and it was definitely against me as opposed to away. I made up my mind at that point. There was no going back now anyway. I had crossed the line as soon as I had pulled down her panties. Now it was just a matter of how deep I was willing to get into this. And I wanted to go deeper. A lot deeper.
"Meg, I think you better show me what you were doing to that boy. Your behavior has put me in a state that requires release, and since you were the one that caused it, it only makes sense that you fix it." It was a pretty weak argument, I admit, but I didn't care at that point. I was going out of my mind with my nubile young virginal sister draped half naked across my waist.
To my surprise, Meg wasted no time slipping off my lap and kneeling down in front of me. She looked up with that little half smile, and I wondered instantly whether or not I had somehow been played. Who was in control here, anyway?
Before I could dwell on it, her hands were on the front of my pants, working the button free and yanking on the zipper. Within seconds she had them undone and was pulling them down my legs, bringing my boxers along with them. My ten inch cock sprung free, bouncing back and forth until she returned her attention to it with a little gasp.
"Wow," she said. "That's a lot bigger than what I'm used to..."
I smiled, having seen the boy from earlier as he jumped out of bed. I had at least two inches on him, and I was much thicker.
Meg rubbed her hand up and down my shaft to start, warming my cock with the friction before starting to lick around the head and then up and down the length. When she had completely coated me with her saliva, she started to stroke it again as her mouth took me in at the tip. I wanted no part in being teased, though. I grabbed the back of her head and pushed her down, hearing with satisfaction as she whimpered when I hit the back of her throat.
I released my grip and she pulled up with a gasp, but only for long enough to catch her breath before I pushed her down again. I continued that way until she got the hint and started to deep throat me on her own, finally getting the hang of it with only the occasional gagging noise. I felt like I was going to explode, but it was too soon, so I grabbed a fistful of her hair and pulled her off.
"That's enough," I said. "Take your shirt off. I want to see your tits."
"Ok, Nathan," she said.
Meg reached down and grabbed the hem of her shirt, pulling it up and over her head, letting her big breasts spill forward. The nipples were dark and brown, with matching areolas that were begging to be sucked. I’d thought about those tits a lot in the last year, although I never thought I’d