This happened about three years ago I was travailing on a coach on holiday in Thailand with my boyfriend, it was a very hot day and my boyfriend was horny as hell. He kept touching me so I was getting just as horny as him so I slid my hand under my skirt and started rubbing myself but I couldn't let myself go properly so I was getting frustrated.
My boyfriend suggested that I go to the toilet on the coach and give myself a good seeing to so I agreed and off I went. So I went in the toilet and started to masturbate, just as I was ready to cum the door flung open and there's this old man looking straight at me. I was mortified, he just said sorry and shut the door. I fixed myself and sat down next to my boyfriend and had a right go at him. He asked why I didn't lock the door, I told him I had but it must have had a dodgy lock. I had to sit on that coach another hour or so and I couldn't wait to get off it. I kept seeing him looking at me smiling. Am sure he told his partner what had happened, but when I think back now I get so horny because I bet he had a good tug that night.