outsmarthesystem, I really feel for you. The stab of pain you must have felt when your daughter said and did that must have been really strong. Your continuing to show love and concern for her and to spend time with her are great. I think the best thing you can do is to let her see by example which parent is less stressed, which parent has unconditional love and which parent puts her and her interests first regardless of what the WTS says.
I have found in my own life that spending as much time as I can with my kids in activities they enjoy has made a really big difference in our relationship.
Depending on your situation and your kids personalities it may be helpful if they see you reading your Bible and when you're with them talking about God or Jesus a bit to them. It might make it harder for your wife and others to paint you as a Godless heathen if the kids know otherwise from a young age.