Cause for alarm?

[MrBond]

Just a suggestion.

What you're doing so far isn't working, so when she starts saying things about how she wants to leave, etc. Just agree with her.

Say things like, "You know, you're right, no one is making you move out. I understand that you feel you'll never be happy in this marriage."

Then prove her wrong. Like DB says, you agree with them to lower their guard, then SHOW them what a catch you are.