I reply, telling her to come over and ask me face to face. She looks furtively around and asks me if I'm nervous. There is tension in the air like North and South Korea coming together to hammer out a treaty.
Suddenly the realisation of how odd it is to meet a stranger with the express intention of having an affair dawns on me. It's more like Alan Sugar interviewing an apprentice.
I'm already starting to feel like I've had enough of this experiment.
It may sound like an unpleasant niche website for a handful of amoral people to whom wedding vows never meant very much.
But it claims to have more than 100,000 members in the UK.
So I paid £119 for a month's membership, giving me an entre to thousands of faithless females.
They are allowed to sign up for free as a way of ensuring the numbers are balanced between the sexes.