As long as she understands you are trying to save her family I can't imagine she's going to be frustrated with you.
YOu want them a bit frustrated with thier father. You want them dissappointed enough to express it so they pressure him to cooperate...
If everyone is civilized and calm then your H won't feel any pressure and an exit will be easier...
If he is going to exit that's his choice, but his family's job is to make that a difficult choice for him.
I don't communicate with my family, but they make it very easy to avoid them.
Don't worry if the kids are frustrated or scared (this usually appears as anger, but anger really is simply a mask for a deeper emotion)... They need to feel something in order to pressure your H.
