Fucking my sister’s hot friend

I had always admired her; her great personality, her stunning body. This is the story of how I finally fucked my younger sisters hot best friend. Beckie and I had always been good friends, comfortable around each other and we knew each others secrets, but we had never done anything sexual together. I had occasionally seen glances of her half naked body as she changed with the door open, but had never stopped and stared as most boys my age would.

This story starts on a warm summer night a couple years ago. My parents were out, and my sister had Beckie around for a sleepover. I was downstairs watching TV, and the girls were in my sisters room trying on clothes, as they had been shopping earlier. Except for the TV, the house was pretty much silent, except for occasional loud bursts of laughter coming from upstairs. The TV programme I was watching came to an end, so I flicked off the TV and lightly made my way upstairs to take a shower. As I passed my sisters room, I noticed that the was open a crack, so I took a peek in. What I saw took my breath away from me.

My sister was lying on the bed, wearing nothing but her small panties, but that isn’t what really grabbed my attention. Beckie was standing on the bed, wearing a tiny pleated skirt and a tight top that barely concealed her large tits. As she swayed her hips to some imaginary music, her skirt rode up and exposed a tiny thong that wasn’t really doing a great job of covering her smooth, hairless pussy.  I could see that her pussy was damp.

“How do I look?”, she asked my sister.

“You look sexy, the boys will love it.”

“You really think that?”

“Yeah, I would fuck that”, my sister giggled, jokingly running her hand up Beckie’s leg.

Beckie moaned and whispered, “that feels so good!”

My sister giggled again, and continued running her hand up Beckie’s tanned leg until she finally reached her wet pussy.

“Dirty girl”, Beckie giggled, and my sister began to gently finger Beckie, running her fingers teasingly between her pussy lips before starting to finger her in earnest, pushing her fingers in and out of her and rubbing Beckie’s clit with her thumb.

By this point, my cock was rock hard and pushing painfully hard against my tight jeans. I decided I had to do something about it. I pulled off my jeans and boxers, and wrapped by hand around my thick cock, before beginning to jerk off to the scene unfolding in front of me. By this point, Beckie had laid down on her back on the bed, her knees in the air and her legs spread with her wet pussy clearly on display, while my sister was knelt beside her, fingers buried in Beckie’s pussy. Her fingers were a blur as they frantically pumped in and out and Beckie raised her hips, desperately pushing her pussy harder into my sisters hand. Beckie reached up and pushed up her top, springing her large tits into view, and my sister reached up with her spare hand and started rubbing Beckie’s tits, running her thumb in small circles around her nipples. Beckie’s response was immediate; she began to moan softly, and squirm further against my sister’s hand. I knew that she was approaching orgasm, and as I felt a familiar sensation in my cock, knew that I was too.