Here's another one I've found on another site, sick but sexy.....

"My sister and I have had a really good relationship...We sometimes cuddle and sleep in the same bed. But for a while it was just as family..And one night were in the same bed and i feel her hand moving down my pants. She says how nice it is that I shave. Then she crawls down the bed and spreads my legs and starts kissing them. Then I feel her sucking on my pussy and Im so wet. Then I crawl on top of her and and spread her legs..I lick her pussy and suck so hard. I slide one finger up and eventually get 4 up..Ive never been so horny..not even with my boyfriend. We dont act like anything happens when we are around our family..Except one time we were home alone and i see her in the kitchen with only her bra on. I go up to her and start massaging her and kissing the back of her neck. Then were on the floor and shes between my legs. It feels so good and I get so fuckin horny around her. No other girl has ever turned me on besides her..Her pussy is the best thing and I love sucking her out"