Awful, awful advice . I did wonder if Thanks for pointing out that there is nothing about you that anyone should find attractive. Grey hair, post-menopausal, small breasts and sensible clothes – what’s to like? is hitting a bit close to home - if that's hoe she is seeing herself to an extent and do wants to point out that she is still a sexy goddess who make men fall at her feet.
At least the comments seem to get it.
In the unlikely event that the woman concerned is on here: tell him no. Quietly if necessary, if they are still in the same room. "NO I am NOT interested. NO, I never will be. And YES, if you touch me once more I WILL tell your wife." He won't know you're bluffing if said with enough quiet anger.
And tell your husband once it I'd done, although in a jokey way. It happened, it's dealth with, move on. That way he knows you aren't encouraging it.