Mother In Black

A few months ago now I tracked my eldest daughters father down via facebook who she lost contact with when she was 3 years old.
I thought all was going well and I've been patient as I understand that he works full time and his hours are all over the place so I never nagged or harped on him meeting up with our daughter and instead told him to tell me when he was able to catch up with our child which he said may not be for a while.
My ex has moved on and is now happily married which is great, but I don't know his wife and obviously neither does my daughter yet I'm finding emails in our inbox on facebook from this woman on a weekly basis. These emails aren't exactly nice as the first one was to my daughter accusing her of hurting her Dads feelings when all she did was ask him how long until they can meet up. I thought it was a fair enough question and didn't deserve the responce it got from a woman we dont know.
Yesterday I recieved a very and I mean verrrrrry abusive email from this woman accusing me of bagging my e all over facebook and telling me to grow the hell up. Well excuse me I have never and would never write a status about my ex especially one that would bag him.
It is so hard to communicate with my ex as his wife seems to use his facebook more than what he does himself and it appears that she responds and writes to my daughter more than what her own father does which really ticks me off. I'm fine with my child getting to know her technically step Mum, but I dont appreciat that this woman appears to be trying to start a fight over something that was never said or done. Grrrrr fair enough if my ex allows his wife to use his account to play games, but why not tell her to butt out of him talking to his child especially because the abuse that I coped yesterday has now got me rethinking about staying in contact.
My current partner and love of my life told me before I even tracked my ex down that it would end up being a mistake and that my child would only end up hurt. I was positive that he would be wrong and that it would all work out and then my child would finally have her Dad back in her life and know him for the great guy that he is, but instead its starting to look like my fiance was right, It seems a huge mistake that I now cant take back and feel so guilty for dragging my child into this situation when I should have know better.

There rant over