Thank you for all your comments. I've regained my equilibrium now, although I still think it was a silly and ill-mannered thing to say. For those who can't see why I was niggled - just think how you would react, seriously.
JackyB and others - yes, I think you're right - my husband would be quite a 'catch' in many ways, and he does come into contact with some desperate women, of which this particular acquaintance is a prime example. At least he tells me of such encounters, so I am grateful for that. I'll start worrying when he doesn't. 