GH, what do you hope to gain by asking her? In my situation I want reassurances. I didn't really get any and I put more friction and pressure on the situation.
It sounds like the controlling GH is under the surface trying to come out. Right now, take her for her word. If she said she is going out, then she is going out. Do not start speculating and letting your paranoia control you.
Of course, you can do what you want but be prepared for things you don't want to hear, like more lies.