You need to step back and take a deep breath. What you are describing is normal teenager behavior. Don't read so much into it. I have three teen daughters 19, 17, 15, so I speak with experience on this.
In terms of talking to your daughter, don't be surprised if she does not want to talk about it. If she does, I would frame it in a way that lets her feel she is participating in the decision. You could set it up by telling her that her mom is pushing the divorce forward as fast as possible. Let her know that the court system wants to know her living arrangements as part of the divorce. Tell her the different options. Tell her that you feel that she should be as comfortable in her choice as she can be and that she should not feel that she is choosing between either of you. That you will always be there for her. Let her know that she should let either of you know if you or your wife are putting any pressure on her to choose one of you over the other. Tell her when you need to let them know and that you are available to answer any question she may have.
Twisting on Life's Rope Me53 W53 M20 D21 D19 D16 BD 2-2013 D final 1-2015 _________________________ "Dream about tomorrow, Live for today, Learn from yesterday"