I know its tough and I sense you continue to go back n forth a bit thinking she could truly be sorry and that you really want the "real wife" back....
Do you keep a daily log of your interactions with her in relations to your kids? I would document everything day by day no matter how you have to do it. It will go a long way if she is not being the mother she needs to be and you need to fight for your children.
Your kids will pick up on things and realize what is going on expecially if she is lying and saying things she should not
Focus on being the best dad you can be and things will fall into place for you. Its all we can do for now right?
_________________________ Me-48 Spouse-WAW 52 Married for 10 years D7 ILYBNILWY 7/15 Suspect EA/PA 12/15 No confirmation/denial She files 1/2016 Working towards the Big D ...still in progress....