My mom never knew this happened. I was passing the bathroom and the door was half open. I could see my mom's reflection in the mirror. She was standing with her back to it completely naked wiping off her make up. Suddenly she bent right over double to rub her ankle and I saw everything, her pussy, whose lips were shaved, and her anus. I couldn't believe it. Mom's anus. The last thing I ever expected to see and there it was, looking at me. I just stood and stared. She was only bent over for a few seconds but it was long enough for the image to be imprinted on my memory and I can still remember exactly what she looked like 20 years later. In fact, there is no day when I don't think about it. I've never seen any other woman exposed like that except in photographs. My wife likes me to touch her anus but she won't show it to me even though I've pleaded with her. She thinks it's disgusting that I saw my mom although I thought it was beautiful, her plump labia and buttocks parted by the act of bending to display her most private places without her knowing about it. Her not knowing made it even more special than if she had deliberately shown herself to me although she would never, ever have done that. It was the only time I remember seeing my mom naked because she was quite prudish about that sort of thing. I gave her an extra warm goodnight kiss and hug that evening and she gave me a quizzical smile. « What's the secret ? » she asked. If only she'd known.