If her behavior is bad, try putting some nanny cams in the house that can record sound, just in the public areas--living room, kitchen, so forth. Keep written documents on everything. IS her bills spelled out on paper, if so, keep track of what she is and isn't paying. Get documents showing you are the father. Start looking for a smaller place, even just 1 bedroom (for the kids) and you get a sleep sofa. Try and do everything at once. If you are a named father, you are able to take the kids with you just as easily as she can, so be careful but if you NEED to move out, they need to move out with you too. Make sure you have an attorney for when she starts pulling stunts since you know she will. Make sure you sleep on the couch or something so that is she starts yelling abuse you can pull out the nanny cam tapes. Document everything! and be ready for a fight if the 2 of you split.