The Treehouse

This started a few months back. My family was here visiting for the holidays. As usual I spent a lot of the time hanging around with my sister Melissa. Since there were so many people around we never got a chance to have one of our normal masturbation sessions. I didn't really mind that much. I was just happy to be able to talk to her face-to-face instead of on the phone or on Skype. A few times wed bundle up and head out to the porch. We'd chat until we were about to freeze our butts off. The day before she left to go back home we were talking on the porch and Melissa looked at me and said, "Have you ever wanted to masturbate in a place where there's a good chance of getting caught?" I said, "I used to think about it in college. Why?" She told me that she's had a bit of an exhibitionist streak the last few years. She looked at me and said, almost in a whisper, "Would you ever masturbate with me in a place like that?"

I was a bit shocked at her comments, but a bit curious at the same time. I said, "I'd have to think about it. Do you have a place in mind?" Melissa pointed across the street and said, "There." She was pointing at a treehouse in the side-yard of the house across the street. The house had been vacant for over a year and very few people even looked into buying it. Those that did were turned away by the price. The treehouse is high enough to where we wouldn't be seen by cars but most of the neighbors can see inside from their second floor windows. I told her I'd think about it and let her know. We went back inside and talked with the rest of the family until bedtime. That entire night in bed I couldn't get our conversation out of my head. At first I thought it would be too risky. But each time I thought about it the more interesting it sounded. It took me about a week to decide that I definitely wanted to do it.

The evening after I made my decision I called Melissa. We talked for a few minutes then I told her about what I decided. I could hear the excitement in her voice. We decided that the next time she was here we would masturbate together in the treehouse. Fast-forward to about two weeks ago. Melissa was here visiting me during Easter. The morning after she got here we got ready. I put on a t-shirt and gym shorts and Melissa put on a t-shirt and a knee-length skirt. On the way out the door I grabbed a gym bag I had by the door. Melissa said, "Whats that for?" I said, "You'll see." We went across the street and climbed the ladder into the treehouse. I opened the bag and pulled out two towels, one for each of us to sit on. We got undressed and sat down. Melissa asked me if I was okay. I told her I was just a bit nervous. I began stroking my cock so I could get hard. Melissa watched for a minute then she spread her legs. Her pussy was already soaking wet and she hadn't even touched it yet! She saw the surprised look on my face and smiled. She said, "The thought of a stranger seeing me masturbate gets me so fucking horny!" I laughed and said, "Sure looks that way." She slowly began running the fingers of her left hand along the outer lips of her pussy. As she was doing that she began playing with the piercings in her nipples. She alternated between her nipples until they were rock-hard. By this time my cock was as hard as I could get it. I picked up the speed of my stroking and I began squeezing my balls a little. After a few minutes I felt the pressure building so I slowed to delay my orgasm. Melissa began pinching her clit as she rubbed her pussy lips, making quiet moaning sounds as she did it. She gradually began inserting a finger into her soaking-wet pussy. She looked up and quietly moaned, "Oh fuck!!" A few minutes went by as she fingered herself with one finger, then two, then finally three. As her fingers completely disappeared into her she closed her eyes and barely whispered, "Oh fuck yessss!"

I was so focused on watching Melissa that I didn't think to slow when I felt the pressure build. All of a sudden I was hit with an incredible orgasm. At first the pleasure was subtle, then once I began ejaculating the amount of pleasure I felt increased so much I began to feel light-headed. Wave after wave of the most amazing feelings rushed all through my body. I never knew this amount of pleasure was possible. It was without a doubt the most incredible orgasm of my life.

Once I regained my composure I looked at Melissa. She was laying down, pinching her clit with one hand and fucking herself with her other hand. She had four fingers in her pussy at this point. Her fingers were moving in and out so fast they were almost a blur. The hand on clit moved to her left nipple where she began pinching and twisting it. After about two minutes of doing this I saw her orgasm beginning. Her toes began to curl. She moaned, "Oh fuck I'm cumming!!" She arched her back and screamed, "OH MY FUCKING GOD YES!!!!" I moved over to her and cupped my hand to her mouth to muffle the screams. Her body was bucking so hard as she was ravaged with the most intense orgasm I had ever seen her have. Just as I thought it was about to subside she pulled her fingers out. Fluids began to flood out of her. Her back arched again and she screamed "OH FUCK!" almost at the top of her lungs. She collapsed into my arms and smiled at me. We spent twenty minutes just laying there. There was no way either of us could climb down yet. We sat up and Melissa said, "Did you have fun?" I said, "Oh god yes!" A week later Melissa went home. After she got back to her house, she called me to let me know she made it home safely. We chatted for a few minutes then I said, "Guess what I'm working up the plans for." She asked me what, and I said, "Our very own treehouse." Melissa squealed and said, "I'm gonna visit you for a month this summer. Be prepared for the best summer of your life!"