Speaking from experience, unfortunately. My husband an affair lasting a year. I was the very last person to know it seems. Claimed it was only emotional but don’t they all. Still in the process of divorcing his slimy arse.
The notion of staying together honestly never entered my mind. To lie to my face, betray me so cruelly, to talk about me to the ow and humiliate publicly meant he had zero regard or respect for me.
How to people convince themselves otherwise when their partners cheat time and time again?