I think that is the best answer you will get for you. It's the only way you will know why it has happened in your sitch. Everyone's sitch and reasons are different.
My mom was a WAS. She had been verbally abused and berated by my father for years. He was an alcoholic. She was worried he was going to start physically harming my sister and I. She moved out with us in order to survive. 35yrs later mt parents are still married. They now live next to one another. Go figure.
My sister and I still don't understand it.
Saffie
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength