At the store the other day, I was eating with my kids and this mother was across from us. She had a rather short skirt on and did everything she could to keep everything covered. Eventually, her killed spilled something and she jumped into action by keeping her right leg where it was, but moved her left leg over as far as she could to reach something to wipe up the milk/juice/whatever it was. She exposed her white panties to about 50 people walking by and shopping with her legs wide open. My wife caught me looking but I didn't care.
After the lady cleaned up her stuff, she went back to working hard to keep her legs closed as though not a thing happened. She glared at me the rest of the time, though, so either she assumed I saw and assumed I didn't look away, or she wanted me to see (but probably the former, heh).