When I was younger, probably about 14 or so, my family went on vacation to Florida and stayed in a condo on the beach. It was kind of like a small apartment, but the only thing different was you had to rinse off before going back inside so you wouldn't track in any sand. There were two little wooden rooms by all of the buildings, one for men and one for women and they had about half a dozen shower heads in them. I went in with my mom and sister and I was just going to rinse off in my suit, but my mom said I couldn't because I wouldn't get all of it off. She then took off her bathing suit and told us to do the same. It felt kind of weird because we had never been naked together before, but I figured we were all family so it was OK. We stood under the water for a couple minutes then wrapped up in our towels to walk back to our condo and took turns in the bathroom.
The next day we were out on the beach again but I was feeling kind of tired, so I was going to go back inside. I went into the shower and got naked, loving the feeling of being bare outside. By the time I finished washing off, I was feeling pretty horny. I hadn't been masturbating long, so it was still a new and fun thing for me, and I knew I wanted to do it. I felt a little daring, so I walked out holding my suit and towel and ran back to the room naked. As soon as I got back in, I jumped on the couch and started rubbing my fuzzy pussy. I guess I lost track of time, because when I was all spread out, my mom walked in. I gasped and grabbed a pillow to cover myself, and I thought I was in big trouble for doing it. Surprisingly, she just started walking past me, apologized for walking in on me and said not to let her stop me. She then went to the bathroom and started the shower. Since she said I could I started rubbing again, almost cumming instantly from being caught, wiggling and squirming around in total pleasure. When I came down, I ran off to our room to get dressed.
Later on, when I was alone with my mom, she sat down with me to talk. I thought I was going to hear it all, but she said it was OK to masturbate. She even said she wanted me to masturbate because it feels good and is a part of growing up, and that she still did it too. She asked me questions about how long I have done it, but she also talked to me about boys and safe sex, which I knew I wasn't ready for. She also told me about privacy and to do it behind a locked door, which I said I would. Since then I have masturbated thousands of times, almost feeling like I was making her proud. I love my mom.