I was on holiday with my close relatives for my 15th birthday in southern Spain and I was climbing out of the pool. There were these weird huts which encompassed a shower and a toilet in each separate one. My family had already gone back to the hotel room while I was going to get showered off in one of these huts. The only one available had no lock on it but by this age I decided to just risk it to be as quick as possible. I was coming the end of my shower and decided to masturbate for the last few minutes when I heard the hut's door squeak and open. The shower was around the corner from the door and I heard this voice of a young girl muttering to helself. I now was mid-masturbating with a huge erection, fully naked, with a girl I presumed to be around my age around the corner...! She then came round the corner with her swimming costume half undone so I could see most of her large breasts. I had remembered swimming past her earlier and seeing a little pubic hair peeking out of her costume as she sat on the side of the pool. I got a bit hard after seeing that and that is why I stayed at the pool longer than the rest of my family as I was too embarrassed to come out with an erection fully showing. She naturally recoiled back round the corner as she saw my erection and apologised immediately. However then instead of leaving, she just returned and stood in front of me, looking at my huge boner. It was getting even bigger now I was looking at most of her breasts. She then just continued to strip her costume off and grabbed my penis. We both agreed that the best thing to do in this situation was to touch each other and she gave me my first blow job (from another person of course). We arranged to meet up two days later and we found ourselves, once again, feeling and fingering each other. I couldn't've asked for a much better birthday present could I?!
