My Sister

When my sister and I were in our teens, she had just come back from the gym complaining her muscles were stiff and she needed a shower.

After her wash she came in to my room and asked me to give her a massage on her legs. I said yes straight away. I went in to her room a few minutes later and she took off her jogging bottoms to reveal her red underwear that was covering her ass. I have masturbated a lot thinking about her ass.

So I started rubbing her legs with oil when she asked me to rub her lower back as well. I started there and could not keep my eyes off her ass, shaking in the timing of my hands rubbing her back. I started to get hard and it was showing through my jogging bottoms.

Something took over me which I didn't think ever would. I suddenly had the urge to touch her ass. I put my face really close to her left ass cheek and inhaled through my nose. I loved it. She looked back and said "Enjoying yourself little brother!" and smiled. "Yes, your ass is turning me on", I said, "do you mind if I get my cock out?" She gasped as if she was shocked.

But out of nowhere I took my cock out of my bottoms and started rubbing it fast. I pulled her underwear down slowly and there was her full ass. "Oh god", she said, "Are you going to squirt your stuff on me?" I said nothing and rubbed my cock hard and then went for broke as I moved up and lay on top of her, but not putting all my weight on her and started rubbing my stiff cock in between her ass cheeks. I came in five to six strokes.

I quickly got a tissue and cleaned her up. This was the only time something like this had happened. We never spoke about it again.