"Mmm yeah" I softly moaned to myself as I gently rubbed my hand up and down my hard cock. I am in my room on my bed masturbating, thinking of my sister's best friend who happened to be currently sleeping in the room next door, with my sister. I haven't stopped thinking about her ever since she arrived here this morning to spend some time with my sister...and my cock.
Kate and I have been fucking each other ever since the time she walked in on me watching porn. That was about a year ago now, and every time she sleeps over here we continue our tradition of fucking all night while my sister is asleep. Usually she comes into my room after my sister has fallen asleep, but the last couple of times she has played hard-to-get and made me come next door and find her there, with my sister only a few metres away on the other bed.
I got up and walked out into the hallway, naked, and slowly opened my sister's door. I glanced in, and smiled to myself when I found Kate asleep in her silky nightdress. Making sure my sister was sound asleep, I climbed onto Kate's bed and as slowly as I could, took away her blanket. Knowing she didn't have any panties or bra on, as was the tradition, I slid my hand up the inside of her left thigh, under the nightdress, and found her pussy.
I softly and slowly rubbed my hand up and down her pussy as I heard her softly moan in her sleep. I rested my other hand over her right breast and felt her nipple harden against my palm through the fabric as I slid a finger into her wet pussy. I then bent down and lifted her nightdress above her waist, exposing her to the night.
I slid my finger out of her pussy as I traced my tongue up her thigh until it found her pussy with it. With my fingers I spread her pussy lips open as I licked up and down her wet slit, pushing my tongue into her opening.
"Oh fuck that's good" I heard her moan. Looking up, I smiled at her as she licked her lips while she pulled the top of her dress down, so her breasts were also exposed. She looked great in her bunched up nightdress, which now only covered her stomach.
"Mmm fuck me." She said softly as I moved myself up on her body, so my cock head rested against her soft pussy.
"Is she still asleep?" I asked Kate. My sister's bed was behind me, so I thought I'd check with Kate, as she could see my sister. As kinky as it was, fucking my sister's best friend while she slept a few metres away, I'd rather not get her involved.
"Yes." She replied with a devilish grin. With that, I spread her pussy lips with my fingers and slowly pushed my cock into her, until it was as deep as it would go. Kate let out a loud moan as I held my cock deep in her, getting used to her tight pussy squeezing my hard cock.