"Slow, Danny. Gentle."
I heard the words but only just managed to turn their meaning into restraint. My loins screamed at me to fuck her hard. I trembled like a fevered buck at the erotic sensation of what we were doing, the effort it took to control myself, and the knowledge that this gorgeous girl, whose ass I was penetrating, was my own sister.
I pressed, she retreated away. I pressed again, with the same result. I pressed more gently, and she held firm.
I heard her panting. I looked down as she pulled her ass cheeks aside for me, and I saw my cock stretching her asshole so tight that it looked brighter, angry. But she didn't resist. I pressed again.
At each gentle press, Annie held firm. I pulled a little further out, then pressed back in. Still she held firm. How I managed to prevent myself letting rip I will never know. I was shaking with lust. But I wouldn't hurt her.
After a little while, my pressing became small thrusts. Still later, longer thrusts. Then I felt Annie pressing back at my cock, no longer retreating from it or merely accepting it. Her throaty moans told me her ass had accepted me and she was enjoying it. So I fucked her ass properly.
The strokes were firm, not as long as in her pussy, but the tightness and heat in there sent twinges along my cock and through my whole being. Now she rocked as I pushed, our thighs brushing at the end of my strokes. If the earth was coming to an end, I wouldn't have cared. All I wanted - desired, needed - was to shoot cum up my sister's ass.
This one was a slow builder. It started in my own ass, my balls tingling as they tightened. The pre-cum burning was intense, like a hot poker, and seemed to linger and delay my release. But it could not have prevented it.
I grabbed Annie's hips and pulled her onto my rod as my cum started its journey, given energy by my long panting grunts. I pulsed hard, jetting goo in Annie's passage, unaware of anything about her other than her ass and my cock spurting in it. Two, three - how many times? I had no idea. I literally swooned, fireworks exploding in my head, practically unconscious.
For what seemed like ages after the final gob, my cock still twitched inside her. She bravely stayed still while my senses returned. Still those fireworks went off in my brain, in time with the pumping of my heart. But my second ejaculation in a matter of minutes ensured my cock deflated quickly. When it was at half mast, I eased my hips backwards.
Annie grunted as it flopped out of her. I saw her ring clench back and wondered how I'd managed to get my cock in there at all.
I realised than that I'd been selfish. I pulled Annie upright and turned her around. Her fringe and forehead were damp with sweat, but she beamed pink.
"Jesus H Christ, Annie. I'm still shaking. Did I hurt you?"
"Hah. A little."
"I'm sorry."
"Don't be. I wanted it. I even liked it once the initial pain was gone."
"Oh."
"I'm sore now, though. And dripping. Hand me those tissues."
I did. She deftly mopped away the mess, then smiled at me and said: "Don't just stand there, wash your hands and finish making the tea. And don't scald yourself again! Last time you did that ended up with a blowjob and anal and a girl's not a robot!"
I joined in her laughter. As good as it sounded to go around naked all day, it was impractical - a bit messy and unhygienic too. But we only wore underpants that day. We cleaned, cooked, talked, watched TV.
And we fucked once more, missionary, simple, still spectacular. After those first frantic, frenzied, exploratory days, Annie and I settled into a secret sexual tryst that lasted way past when she got married. I have a girlfriend. She won't let me have anal sex with her, but no matter.
Annie does.
