Because your wife has been covertly and overtly bullying you from wayward day one.
A lot of infidelity stems from bullying. Your wayward spouse feels miserable so they want you to feel as miserable as they do, so they pour gasoline on a home that is already on fire and set the home ablaze.
Your wife and now this FT tag team you in a HEALING session into leaving your home and now they have made you feel so damn miserable you are ready to do it.
People have been saying do what YOU need to do for YOU. If YOU need to stay in that home and work on it for a while longer and YOU need that then YOU DO IT.
To HELL with your wife and her bullying.
Don't do the same thing that people being bullied do - give in... You will regret it years from now.