A very weird thing has happened. A strange old lady has moved into my house. I have no idea who she is, where she came from, or how she got in. I certainly did not invite her. All I know is that one day she wasn't there, and the next day she was.

She is a clever old lady, and manages to keep out of sight for the most part, but whenever I pass a mirror, I catch a glimpse of her. And whenever I look in the mirror to check my appearance, there she is, hogging the whole thing, completely obliterat...