When I picked up my granddaughter from school yesterday, she found some chewing gum stuck to the sole of her shoe. She bent down to remove it and took quite a while. During this time I had the perfect view of her red knickers trimmed with black, under sheer black pantyhose. It was too much for me and I cummed my panties. But the feeling as I messed myself was awesome. I managed to cover myself with my jacket until we got home and I could clean up as the stain had come right through my trousers, and some semen had run down my leg onto my shoe.