While iniially you may feel a rush as you tell her off... it would be basically just like confronting the OW, in one ear and out the other and the next thing you hear your H will be calling you and screaming at you. It will be turned all around on YOU. You'll be made to look like the bad person, the evil one, etc... trust me if she cared even an inkling, she wouldn't have been bragging to your daughter and most certainly wouldn't be promoting their A. But most people only learn this after they have confronted... but just sharing with you just in case ;-)
I'm also not a fan of exposure of As and having family and friends get involved... often if there is even a chance of reconciliation possible, with everyone taking sides (and we know they ALL do) it leaves the person who had an A feeling even more guilt and afraid to come home, because what will everyone think. But some people need a good support network and get that from their family... your mileage may vary.
Your best bet is to truly act like a lady. This woman doesn't sound like a lady to me. Be thankful that you are thousands of miles away from her. Sad for your daughter to have been exposed to this. Uncalled for. Hopefully your H gave her an earful for speaking to your daughter about it. But at 14 your daughter is one smart cookie...
Personally I'd turn my head and not waste another moment on this woman, I'd be off getting a life and not giving her another thought. I know it hurts... I do... been there done that but you do know the saying "kill em with kindness?"
