Hang in there AD this stuff is to be expected! You have to be the better person now and take the high road, don't let her words or actions get to you!!!
Concentrate on you and the weight loss program and who can forget the 1000 BUCKS!!!!! Stay strong and stay focused on what is important to you, that would be YOU and Abby!! Make it the BEST birthday she will ever have and remember for a lifetime, and she will always remember how daddy came through for HER!!!
I myself am down to a wimpy 213 from 245 and I have started to drink protein shakes cause I am losing to much. Hitting the weights really hard now to bulk up, I want to stay in the 220-230 range, that way the women will be mesmerized...lol.