My Gym Buddy Sister

My sister Laura who is 27 and me, Dan 26 moved out of our parents home at the turn of the year into a 2 bedroom flat in a small town. The only thing to do was really go to the gym across the road from us which we done every night after work.

Any way as we stayed together it meant I had a lot of time to perv on her as she was a good looking girl, she was about 5 10 and a size 12 with 34C tits ( i knew because i done her washing) short brown hair and blue eyes. Sometimes i used to wank into her thongs and put them back in her drawers, i think she knew and didnt say as i found a pair i had wanked into in the dirty laundry basket meaning she had wore them!!

After the gym one night we both headed to our respective changing rooms, it was always quiet in the gym and always had the place to ourselves. I was in the shower and heard the males changing room door open.

“dan, the girls showers dont work, i am going to use the mens”
“sure sis”
my cock sprang to life and i had to start having a pull as i heard her clothes come off, i could also make her out through the curtain.
“well well,” she said pulling back the curtain, she was totally naked, her nipples were rock hard and i saw my sisters pussy for the first time, it was sexy as hell with a small black landing strip of pubes.
“arent you a big boy bro” she said as she came into my shower cubical.

we started kissing and my hands ran all over her body, under the high pressure of the shower jets we both were in ecstasy, she wanked my cock as i sucked on her nipples.

“you know, dan, i know all about you wanking into my thongs”
“you dont seem to care much” we both laughed
” sitting at work with my brothers cum all over my pussy was hot although its risky as i am not on the pill”

i entered my sisters pussy and started to slowly fuck her doggy style
“stop” my sister slid off my dick and went to her bag on got a condom
she rolled it on and bent over again, inviting me in which i obliged of course, i was ball deep inside my own sister when she stopped me again.
“this is wrong”

she left the shower and got dressed we walked home silently.

A few days passed and we never really spoke of the shower incident.