This happened a few years back when I was in school, I used to sneak into the dance room and hide in the back store room to watch the girls dance. There were windows just below the ceiling where I would stand on top of a small table that was in there to see them. Whilst they were dancing there is a lot of sexy movement and titty bouncing and their teacher Abigail was very attractive.
Well I was watching one day and pulled my pants down around my ankles and decided to have a wank and watch them, I couldn't believe my eyes when my crush Asha was jumping around so much her boob popped out of her shirt. With all this happening I didn't take the time to realise the store room door was being opened, the feeling in my cock was so intense and I shot cum right into the dance teacher Abigails face because of the height of the table, she gagged some of the cum up and had gotten it in her eye, I was so scared but this was turning me on so much so I kept shooting ropes of cum, she was wearing a singlet top and my cum landed on her bare cleavage and her face. I quickly pulled my pants up, threw my hood over my face and ran.
She didn't know who I was so I was never caught but I was always too paranoid to go back to the dance room. Every time I would see Abigail and Asha I would begin to get a hardon, I masturbate to this memory even to this day.