Dear Mary: Someone told me their extraordinary life story, but I tuned the whole thing out

Q. After a recent dinner I found myself on a two-seater sofa enjoying the restful company of a woman who seemed happy to do all the talking while I just nodded and pretended to be listening. I regret my insincerity, not least because of what happened later, but I was slightly drunk. I came to my senses, however, when my wife wanted to leave. It was just in time to hear this woman saying, with a portentous look on her face, that she had never told anyone else what she had just told me. She said that now, having talked about it for the first time, she realised that the whole extraordinary story, although traumatic, had been the most important thing to have ever happened to her. She made me promise never to tell anyone else due to the high profile of the dramatis personae involved.

Mary, were I to know the life-defining secret of this normally standoffish woman, I would keep it to myself.