“Jesus, what the hell was that?” I said, and in response she smiled gleefully and cranked up the speed of her fingers. She now fluttered them across the underside of my cock, just below the ridge, as if she knew just the way to turn up my arousal.
“Just some payback,” she said. “Now we’re even. No matter what happens.”
“Jesus,” I said again. Her fingers felt so good that I was afraid she would take me too far too fast. As much as I didn’t want the stimulation to ever end, there was something else I wanted more. I rolled her on her back and lifted up her legs as she bent her knees. I held them steady with one hand on the back of each thigh.
The parting of her legs slightly spread apart her labia, and I could see the creamy nectar oozing from between her lips. While my cock was unattended, squished between my body and the mattress, I dove in, running my tongue through her liquid, tasting her arousal and spreading her lips even further.
I hungrily lapped her slit, devouring every drop I found, and then took turns letting my mouth and nose explore the delicate folds that made up this precious flower. As I approached her clit I heard a low, primal hum. My anxious tongue had already made it glisten, but now I pulled the firm little dot between my lips and let my tongue flit across it with abandon. This turned the hum into a low moan.
“Jase, turn around,” she said.
I literally stopped in my tracks, completely unexpecting this stage direction. I had to stop and think for a second about what she meant before I got the idea. “Oh. OK,” I said.
I turned my body so I faced her feet, straddling her with my knees astride her chest. I knew my balls would dangle lasciviously toward her face, an un-brotherly pose for sure. I adjusted myself just enough so I could still reach my tongue to her pussy. As I pulled my mouth into position I felt her fingers caressing my balls, then with her other hand she pulled my cock back and plunged the tip in her mouth. “Oh my god,” I said, my lips buzzing against her labia even as I formed the words.
It occurred to me at that moment that it was my sister whose mouth was trapping my cock; it was my sister’s clit that was trapped in my own mouth. The thought at first seemed unusual, but as we kept feeding our sexual fluids to each other, soon it didn’t feel unusual at all. It felt like we had always meant to be with each other. Like our love for each other was too strong to keep us apart. It felt, in a word: perfect.
I started a rhythm, licking her slit from top to bottom, and before I knew it she was using the same rhythm on me, letting her tongue snake around my cock one revolution for every lick of her slit. I moaned against her pussy and she must have felt the vibration because her butt lifted off the bed for a split second, interrupting our tempo only momentarily before picking it back up.
When she hummed her approval in response, I felt a shiver of excitement radiate outward from my penis all across my body, enough even to make my fingers and toes tingle.