This leads up to masturbating. More of how I got so turned on before hand!
Sis and I were very close growing up. We did everything together. So staying up late watching TV was a normal thing. Parents would be in bed, and we would be in our PJ's laying on the couch. I gave her plenty of back rubs, leg rubs, etc. I found out one time that she REALLY loved her inner thighs rubbed.
This night was like all others. I had my shorts on, no shirt. She had on a t-shirt and panties, which she wasn't really shy of hiding. She was sitting with her back at the end of the couch and her knees up, legs slightly parted. I was sitting next to her, and couldn't keep my eyes off of those cute cotton panties.
I asked her if she wanted her thighs rubbed, which she gladly accepted the offer. She said just here-and spread her legs wide open as she continued to watch tv, not really thinking twice. I layed down facing her. I could feel the blood rushing to all parts of my body as I crawled up close, between her legs. She had on soft white cotton panties with little hearts on them. I got as close as I could and put both hands on her inner thighs and started rubbing back and forth. She let out a sigh, and said it felt good. I was leaning on my elbows, and scooted in just a little more. Now I was face to face with her crotch. I could feel my rock hard boner under neath me twitching each time I slid my hands up and down her soft inner thighs. I could now smell a slight fragrance from her pussy. I wanted to burry my face in it, but just continued to stare at it, imagining what was underneath-and to rub up and down her thighs. This went on for quite some time. At one point, she scooted toward me-I almost thought she was getting as turned on as I was, but maybe not-she was just enjoying the leg rub.
Finally, the movie she was watching came to a commercial, and she had to get up to pee. When I heard the bathroom door shut, I pulled out my hard cock, which was now aching to cum. I layed in the spot she was and stroked down on it, then up. I could feel the electricity going through my body.. the rush, the thought of how close I was to her pussy, the softness of her legs.. stroking faster now.. BAMM!
It hit me. The orgasm-cum squirted straight up and all over my stomach and shorts. I stroked it until the twitching of the orgasm subsided, and quickly pulled my shorts back over my cock. Sis came back out, and I covered up with a blanket just in time.
She sat back down, opened her legs back up and said 'Ok, back to my leg rub!'