Brothers Girlfriends Sister

I can't believe this happened, but it did... it is very much a true story. My brother (18) had a few of his friends over the other day, his girlfriend and her sister included. His girlfriend's sister is 20, brunette, green eyes and gorgeous body. We live near the beach, so we went for a swim in the afternoon, about 9 of us in all. I couldn't take my eyes off this girl, she is thin, tall and was wearing a ridiculously skimpy bathing suit, white with a green pattern, to be honest I couldn't tell you what the pattern was, as soon as the suit was wet it was nearly transparent. I could tell she was shaved, as I could see her slit, but no hair at all. We hung out at the beach for an hour or so before heading home, which is just over the road. We all dusted the sand off our feet and headed inside, I made tracks for the bathroom, as I hate sand everywhere, I wanted to have a quick shower to clean off. As I was rinsing away I heard the door open, and quickly covered myself up and turned to face the door, there was my brothers girlfriends sister... I still don't know her name, but she was standing there staring,

'can I help you' I asked

'just need a towel' she replied,

I told her they were under the sink in the cupboard, but she didn't open the cupboard, she closed the door behind her and stepped further into the bathroom,

'You know I've seen naked men before, you don't need to cover up on account of me' she said with a smirk. I was puzzled, to say the least. Here was this drop dead gorgeous girl, three years older than me, in a bikini, asking me to take my hands from in front of my dick. with the excitement, my cupped hands were not covering much by this stage. She took another step forward, and now stood about an arm's length from me.

'I won't tell' she said, leaning into the shower. Then she grabbed my arm, releasing my now raging erection. She looked down and grinned, then leaned further towards me running her hand down my arm towards my penis.

'Well, now that I've seen you' she said, and untied her bikini.

All I could manage was 'whoa!!', she laughed and wrapped her hand around my throbbing dick. Then she grabbed my other hand and moved it over her pussy. I ran my fingers down the side of her vagina, then up and down her moist lips a few times before slipping my middle and index fingers inside, I just about came at that feeling.. she was so wet and warm, I found my way to her clit and started circling it with one finger, whilst I ran another around her lips, in and out.

As I did this she tentatively started to rub my shaft, but by this stage she was breathing heavily and her grip was firming.

'Keep going' she said, her face starting to flush, 'right there, right there', my fingers were slipping over her clit now, as her juices ran down my hand to my wrist, and down her leg. Now she let go of me completely and buckled over, gasping as her pussy contracted around my hand.

She lay there twitching for about 20 seconds, the shower still running and me still standing there, with a boner ready to cum. She looked back up and grinned again, silently she grabbed my dick and pumped hard, 'oh, dude... I'm gonna cum' I barely whimpered as I started to shoot my load all over her beautiful tits and shaved pussy, she ran her fingers over my cum and licked them clean.

'Thanks' she said and left!