It is then that I hear a juddering intake of breath behind me and realize I am not alone. I turn round. I see an expanse of skin and dark hair, flecked with white. A man. He has his left arm outside the covers and there is a gold band on the third finger of the hand. I suppress a groan. So this one is not only old and grey, I think, but also married. Not only have I screwed a married man, but I have done so in what I am guessing is his home, in the bed he must usually share with his wife. I lie back to gather myself. I ought to be ashamed.

I wonder where the wife is. Do I need to worry about her arriving back at any moment? I imagine her standing on the other side of the room, screaming, calling me a slut. A medusa. A mass of snakes. I wonder how I will defend myself, if she does appear. The guy in the bed doesn’t seem concerned, though. He has turned over and snores on.

I lie as still as possible. Usually I can remember how I get into situations like this, but not today. There must have been a party, or a trip to a bar or a club. I must have been pretty wasted. Wasted enough that I don’t remember anything at all. Wasted enough to have gone home with a man with a wedding ring and hairs on his back.

I fold back the covers as gently as I can and sit on the edge of the bed. First, I need to use the bathroom. I ignore the slippers at my feet — after all, fucking the husband is one thing, but I could never wear another woman’s shoes — and creep barefoot on to the landing. I am aware of my nakedness, fearful of choosing the wrong door, of stumbling on a lodger, a teenage son. Relieved, I see the bathroom door is ajar and go in, locking it behind me.

I sit, use the toilet, then flush it and turn to wash my hands. I reach for the soap, but something is wrong. At first I can’t work out what it is, but then I see it. The hand gripping the soap does not look like mine. The skin is wrinkled, the nails are unpolished and bitten to the quick and, like the man in the bed I have just left, the third finger wears a plain, gold wedding ring.