I moved in with my step-mom recently who lives in the middle of nowhere on a farm, she mainly owns horses. I've caught myself weirdly fascinated with the male horses and their unique and large dicks. I was out helping my stepmom with the horses when I saw one doing something with it's huge dick. I couldn't stop watching. My stepmom caught me staring and called me out on my hard erection. Since then our relationship has gotten very weird and sexual.