I strongly recommend you believe everything she says. Not to believe everything she says would be dismissive.
However, take no action on anything she says. Your wife is responsible for her words...not you.
For example, if she says she wants to go to Detente Mediation--believe her. She may 100% want to do this. But until she takes action--it is only words. And words without action are nothing more than expressive thought.
Give her words attention and respect. She is giving you information about her feelings. Even though her words are painful to hear this is still a good thing. There a lot of people on this site who are living with no information at all.
I know this is difficult but don’t let her words cause you the same anxiety that her actions cause you.
