Being left for someone elso is the bisggest betrayal one can ever experience. It makes your head reel. That is slow to pass, even if your STBX is having an affair with "grandpa" as my STBX was and is.
There is no WHY. Yesterday, I heard that a couple who my kids went to school with are getting divorced after 22 years. He just left. She found emails that he was corresponding with 20 women from across the country. Ugh!!!!!