Sorry, didn't want to read through everything.

BASICALLY, it's wrong of him to leave said new wife b/c ex is following biblical instruction. but he, therefore, would not be following biblical instruction. even i know that and i'm not much in to reading the bible.

As follow up information.

My cousin's ex was not promiscuous which shouldn't come as a shock based on their marriage. She shunned him.

My cousin met with my minister and my minister told him (I know some here will disagree) that he views the way his former wife treated her marriage vows of not cleaving to her husband and shunning him in the bedroom as an act of breaking her marital vows. He told my cousin her shunning him in their marriage was a betrayal in the same way as adultery is a betrayal.

At any rate, this is what my cousin needed to hear and he and his current wife seemed to have a new found joy. Really happy for him.