At my high school we have a barnyard, we have animals such as goats, ducks, a horse, a bunny, and a sheep. It is a pretty big area with a with a few pastures and pens and an arena and round pen not far away. I blessed that I am the only one the teacher fully trusts, so needless to say I get a lot of alone time down there. It all started when I was excerising the horse down at the round pen; I had been drinking water all day to keep away dehydration because I had been in the sun all day. But I have a really small bladder that fills up quick, and I was incredibly far from a bathroom. I started squeezing my legs together and bouncing up and down, I knew I could not last much longer. Then as if to mock me my horse that had been running the whole time slowed to a stop and speard her legs and peed a long pee right in front of me. At that point there was a wet spot forming in my lacy panties which were soon yanked down until nothing was between me and peeing on the ground. I immediately squated where i stood and the first squirts started to come out and began making a bubbling puddle in the sand. I moaned as the flow increased, the puddle becoming larger and larger. About a minute later the flow ceased and I observed the giant puddle before me. Then I put on my panties and stuck my tongue out at my horse. I have been doing this morn more often and in as many places as I can. such as in the pastures and in the animal pens and sometimes I will even going on a rock or a tree. and no one suspects a thing because we have animals.