Me and my best friend were about 14 when this happened. We were both late bloomers. I had little pubic hair and her breasts were on the small side. We had never been really cautious about seeing each other nude cause we didn't really care. But one night when she was over for the weekend I noticed she was wearing a training bra. I asked her what it was and she took it off to show me. She said that her mom wanted her to use it because she was starting to 'mature'. I asked what she meant and she said that her boobs were starting to get bigger. I looked at them and noticed for the first time that they were bulging quite a bit. I asked if I could touch them and she said sure. It was the first time that I had ever touched a girl's tits. It was awsome and as soon as I grabed them I got a boner. She asked why I was horny so I lied and said that I had to pee.
I made a quick trip to the bathroom. When I got back I was super quiet so as not to wake my parents in the next room. I opened my door and caught her in the act. She was so lost in masterbation that she didn't even notice me come in. I took advantage of the moment and sat down on the floor. I noticed she was completly naked, caresing her titis and quickly finger fucking herself. Instant boner. I asked her what she was doing and she nearly hit the roof. She turned red and tried to cover up, but I said here and I stripped and said now we are both nudists. She laughed and asked how long I had been sitting there. I answered with a question, 'how long have you been laying there?' Her eyes drifted to my dick and noticed my boner. She told me all about how she had learned about it in Family Life class. So I quizzed her. The topic came upon masterbation and she asked me how often I did. I said , ' I'll tell you if you tell me.' I said every other other day or so and she said 3 or 4 times a day. She took my hand and put it on her pussy. She said that she was so aroused by this conversation that she had to do it. I put my fingers in and started to finger fuck her. She started to moan slightly and came all over my bed. I had rubber sheets so there was little evidence. When she was done she noticed all of the precum oozing out of my dick. She told me to lay down and she went to work. I came and we went to bed.