Salesperson - Something something, your wife.

Mr GoingToBeGoingSomewhere (possibly, if he's lucky) - She's not my wife.

Salesperson - Sorry, your daughter.

Mr GoingToBeGoingSomewhere (possibly, if he's lucky) - She's not my daughter.

At this point Salesperson gives up trying to guess who I might be in relation to Mr GoingToBeGoingSomewhere (possibly, if he's lucky) and I'm grinning happily.

Mr Going-to-be-GoingSomewhere (possibly, if he's lucky) not too sure if he's looking too old. No, no, it's me looking too young. :))