Called my local builder to inspect a issue but was also very horny at the same time, he said he would come over later that day to have a look. He arrived about 8pm, by then i was so horny and couldn't wait, so when he knocked at the door, I answered the door wearing only my lingerie. As i showed him to the issue, i suddenly fell at the top of the stairs and accidentally backed my big arse into his bulging shorts