My friend Marie and I went to a swimming pool every day. We were really good friends and we've seen each other naked several times in the showers at the pool. She had a really cute ass and 34b boobs, the same as I.
That particular day was really cold and there wasn't many people at the pool nor at the showers. I had arrived quite late for the class and when I entered the locker room there were just two women and my friend Marie. She was in her uniform dress unpacking her swimming suit until she saw me. She approached me and told me she had something to show me, but we had to skip the class.
I had never skipped class before, but finally she convinced me. She told me to take off all my clothes except my panties and bra and to follow her to the restrooms that for some reason aren't connected to the locker room and the showers, so we had to go outside to the swimming pool and enter the restroom. She was wearing white panties and matching bra and I was wearing a pink bra and also pink panties with a yellow flower an the pubic region. I was quite scared and embarrassed for going out in panties and bra not in swimming suits, I'm also sure two older girls stared at us while going. I followed her to a door left to the toilets which is always closed, but has a big hole below. She told me to enter and so I did, it was a medium sized room completely empty.
My friend took off her panties and inserted two fingers inside her and took out a small vibrator. She asked me if I had ever masturbated and I answered yes. Then she told me that her mom talked with her about masturbation and later gave her that vibrator. She then asked me if I wanted to try it. I was nervous at first and I was getting really wet, but I assumed it was okay to try. I tried it with my panties on at first and it was such a turn on I continued for five minutes and I orgasmed and discharged a whole bucket of cum into my panties. I looked at Marie, she had been working hard with her own hands for my whole session. She told me I shouldn't moan so loud because there was maybe people outside, but then she did something I didn't expected she took off her bra and then reached out to my panties and took them off, after that she kissed me and slowly removed my bra and kissed my nipples. She then told me she was going to make me cum again. She introduced her fingers in my pussy. And I came again for the second time. Then I returned returned the favor until she climaxed. She came right on my face. I cleaned myself while she recovered, then we both heard the bell that signaled classes were over. But I realized my panties were completely soaked and my friend's panties were also wet. We didn't have any option so we both left the restrooms with our wet panties. We never expected seeing our swimming teacher, who is a female by the way, outside the restrooms waiting for us. She told us she had seen us from the swimming pool as we entered the restrooms, but didn't follow us, so she was just waiting to see if we were okay. Then she looked to our panties and asked us why we're wet. Then she put a strange smile on her face and asked us to come to the nursery with her. We did so, she told us she knew what we had been doing all class. She told us that it was okay, but that we shouldn't do it in the public spaces at the pool. She then told us she could give us a pair of dry panties of her own if we wanted, but we had to return them when we finished putting our clothes on. We agreed and she gave them to us and we got dressed then we returned to the nursery and we gave the panties back and we put our own wet panties where they should be. When I arrived home I took of my clothes, except my panties and rubbed them until I had another orgasm.