I was going to say what JamieB just said about them not trashing your religion. The whole foundation of their religion is to trash yours. I am sure Blondie, Yknot or anyone else can give you some WTS quotes that trash the "churches of Babylon," but at the end of the day, I agree with JamieB that the statement "She says that she does not go around looking for support groups that ‘bad mouth’ my church or religion so she does not understand why I go to a group that bad mouths the WatchTower Society." is a bold-faced lie. My mate and I have actually discussed this point, as it really does hurt my feelings to know my church and worship and spirituality are thought of in such an awful way, and I think he actually gets it. On this board, individuals are criticizing the Watchtower, whereas the Watchtower as an organization criticizes mainstream churches and makes that criticism a part of their doctrine. BIG difference.
Also, I know folks on here are telling you to pull the headship card, but if you don't believe in it or in what the WTS teaches, I don't think you should use it. In a warped way, that would add credence to their teaching. I understand the sentiment, but I'd rather win on merit than on a technicality.
Good luck! You seem very level-headed and I'm sure you'll figure this out.