My younger sister had a friend over one day they was going out that night. My sister had on a little skirt and no panties. She kept flashing her pussy and nice little ass when her friend wasn't looking. Her friend had to shower. so when we heard the water running my sister stood up in front of me and bent over so that little ass. Just as I reached up between her legs and got a finger on her clit her friend walked in to ask her a question. She smiled a little turned around and walked back into the bathroom.