All characters engaging in sex are over 18.
*****
After our first, fumbling fuck my sister and I learned each other's hot buttons gradually. We had plenty of opportunity. Mum was usually already at work by the time I got home, Annie usually arrived just before me. Even on the weekends we saw less and less of our mum, she worked really hard and it worried us a little, even though it gave us the opportunity for unbridled incest.
Our second occasion was the day after our first. Annie had showered and I went into the bathroom. In those early times we were still a little shy around each other naked. Annie had a towel around her while she dried her hair but didn't leave the bathroom while I showered.
"Danny?"
I answered over the sound of water jet: "Yeah?"
"Can I see your cock?"
"Uh, yeah, I guess."
She slid the shower screen aside and looked, then left it open and watched me shower. Knowing she was looking at me with interest made it grow slightly. She giggled.
"Oh that's neat! I wanted to look 'cos I haven't seen it soft yet, but now it's warming up!"
"Show me your tits and it'll go fully hard."
"I'll do better than that..."
Annie dropped her towel and squeezed into the cubicle with me. She was so close that my cock grazed her tummy, in its inevitable upward journey. It delighted her: "Oooh, nice!" She cupped my balls and that made me as hard as ever, now twitching involuntarily. Annie touched it, exploring, feeling, gently stroking. She nestled in close and whispered up into my ear: "Like that, my dirty brother?"
"Mmm, very much."
"Only a few days now and we can do it again..."
"Do what?"
She giggled: "Fuck, mate. We can fuck again."
I twitched some more when she swore like that.
"Oooh, he likes it when I talk dirty. Can I make you cum, do you think?"
"I'm sure of it."
"I mean, what if I said, say, 'would you like to fuck me, Danny?' Oh yes, he likes that idea!"
He certainly did. I stood still under the shower while my sister masturbated me and teased me with her dirty talk.
"Mmmm, Danny. So let's be clear. I'm your own sister and you want to fuck me, right?"
"Yesss."
"I mean, fuck me
again,
of course."
"Yes."
"So, even though we can't, you can still touch my pussy, right?"
I bent my knees a little and slid my hand down her wet tummy, over her mound, and curled two fingers into her pussy. It was warm, it was wet, and it opened to my touch.
"Oh, nice. You have your fingers where your cock was, remember?"
"Oh yes."
"Good. I remember too. You had your cock in there, and you
fucked
me, right?"
"Yesss. Oh fuck, Annie!"
"Right now just imagine we are fucking. You're on top of me, thrusting..."
"Mmm"
"I'm wet. Really wet in my pussy. Imagining that?"
"I'm feeling it."
"Yes, very good."
Now she nibbled my ear, and whispered: "Are you going to cum soon, Danny?"
"Soon."
"Good. Oh my, I think your balls just got tighter. So, Danny. Remember what it felt like to fuck your little sister's pussy."
"Oh shit, Annie..."
"Yes, come on Danny. Remember it. Feel my pussy now. Imagine that's your cock in there..."
"Oh Annie, I'm gonna cum!"
"Yes, big brother. Cum. Cum like you did in my
CUNT!"
That was it. She'd never said that word before and the images in my mind's eye and her whisper in my ear was enough. My cock twitched and jerked as it unloaded my cream jets over her hand and tummy. I looked down and saw it all, the jizz immediately washed away under the shower. I heard Annie giggling even as the last jet sputtered out.
"Oh jesus Annie. You fucking fox! That was horny!"
"Yeah, I just kinda played along. So, note one for future reference. Danny likes dirty talk. OK, you wanna let go of my pussy now?"
"Um, no not really."