I take it that her friend was drunk when she did this?

I find it commendable that your hubby told you...sounds like a good relationship to me.

It's your decision--yup, a mixed bag!
In your place, I think I'd give the b***h the cold shoulder. She was drunk, that was a dirty lowdown trick to play on your hubby; she is beneath you, therefore not worth your energy. (or, rather mine-were I in your place)

However, if she ever did it again; or even looked askance at him; I'd have her head in a vice with the words I'd hurl...she wouldn't know what to do, scratch her watch or wind her ***.

I hope my input made some sense...in the end it's your choice. Pax-------theo