My friend was organising a party and invited me. She also invited my bf and some of his friends to join too. I had decided to wear a nice skirt to the party and was feeling very hot in it and thought it would be great if I wore the thong I had just bought. During the party all is good and went to go to the bathroom, there were some people waiting so I thought I will just use the upstairs bathroom since my friend lets me use it. I walk upstairs and head to the bathroom, after I walk out I see two of my bf's friends sitting on the couch together. I tell them they can use this bathroom as well if they want since it's just us up there at the moment. One of them goes in and I go and sit down with the other friend, We started talking when I dropped my phone and it bounced off the couch and was a little bit away from where we were sitting. I stood up and bend over to grab it, after bending over I realised that I my skirt had moved up and he would have a good view of my thong. I tried to pretend like nothing happened and sat back down, the other friend that was in the bathroom had come out and he had come over and sat down on the floor. They had this little bet going on who would win in a wrestling match between them and were just rolling around on the ground. They had stopped after agreeing it was a tie and noticed that they kept looking in my direction then look away or down. I look at one of them trying to figure what he is looking out and notice he is adjusting his penis. I then realised that they could see my thong between my legs. I asked them about their girlfriends and how they were going and they were very awkwardly answering me. This went on for a little till I went back down stairs and didn't see either of them come back down for about 10 minutes.