You have received good advise so far. Unfortunately I have also been through a divorce. You have already seen that she won't keep her word so you need to expect the worst. If you are on this forum you probably own guns. What would happen if things got ugly and she accuses you of threatening her with a gun. She could file a restraining order and you could loose your CCW if you have one.
If it were me I would take all of my guns out of the house and store them at a relatives house or a buddies. Even the gun you carry. Don't go around her with it. More than likely nothing like that will happen but why not be safe? I am sure there are a lot of guys with a horror story of this happening. Good luck and I hope it works out.

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Tom
NRA Pistol Inst