Oh babe...so sorry to hear about this...crap!! I feel for your D too...we're going to assume that she does know but felt very protective of you...what a girl you have there...but what feelings she must be having to deal with. Do you plan on talking with her.
I wonder why exW didn't have the balls to tell you herself? Seems a bit strange...one would think she would. We can assume again that perhaps she was protecting you...who knows?
Yes, they really did rush into things, I think we can all agree on this. But crap to hear it from the manicurist...wondering why she felt it necessary to even bring it up...in the manner that she did, it was as if she knew that you didn't know...I could see the "I'm surprised to hear that your exW got remarried." Or better yet, "Sorry to hear about your exW, remarriage, this must be tough on you." but the way in which she said it...things that make you go hmmmm...
And feel whatever you feel like feeling at this point. Let it all out...big hugs to you and D13...