My first lesbian experience came when I was 16, I had grew up with my gay friend Sarah and never been that bothered, well we had finished school for summer early as we had just done our GCSE's, I had went around to Sarah's and we had chilled and just relaxed, she introduced me to her girlfriend Helen. I had brought my swimsuit because I knew we were going to have a water fight. We all went into Sarah's room to get changed, I had seen Sarah naked loads of times in PE so I wasn't bothered, I had often looked but never took a keen interest, she and I were very similar build, both blonde, 5ft 8ish, average sized boobs and trimmed. I took a look at Helen while we were changing, she was same height, a brunette, with rather large breasts and totally bald, I followed the lines of the body subconsciously and met her eyes, I looked away in embarrassment, I thought she might think other things. Anyway we got outside and got our ammo of water balloons, guns and a hose pipe and made a load of mess, the water was freezing and my nipples were quite erect but I wasn't bothered as both Sarah's and Helen's were as well. We finished, dryed up and played on the computer etc. We were all sleeping over so, we got ready and snuggled into our sleeping bags, it was a warm summer's day, Sarah and Helen were sleeping naked so I felt like I had to as well. We chatted like girls do taking the mick out of each other and things in general. Hours past and Sarah fell asleep, we were thinking of tricks to play on her and stuff so I put my dressing gown on and went to the bathroom to get a bucket of warm water, Helen followed me to give me a hand. As she came through the door she locked it I asked her what she was doing and she said that she noticed me checking her out and said that it was unfair on Sarah, she pushed me against the wall, got very close to me and whispered in my ear, so much for being a good friend, I pushed her off and we struggled but she managed to pin me. She undid the drawstring on my gown and it fell open, she told me that she had the right as Sarah's girlfriend to punish me. She played with my nipples and I started to enjoy it. She slid her hand up me and started rubbing. I don't know why but I lent forward and kissed her. We rolled around and generally she taught me a few lessons. I was really ashamed though, I was gutted that I had done this to Sarah. The next morning I told her she was furious and she didn't speak to me for months. We got talking again last year when we were 18 and we are now a couple and we use that night as the night we realised we were right for each other.