Shopaholic - WRONG Though Apostacy is a "scriptural" reason for separation it is not one for divorce.
Dozy - RIGHT Nailed it.
When I was an elder we had a sister move into the congregation who was separated from her witness husband. The local elders knew her for years and they appointed her a regular pioneer. The CO rubber stamped it. Then a few months later the elders in her old congregation called upset that she was pioneering. Oddly enough they had appointed him a MS after she left. She was going to divorce him. The CO was confused why all this was happening and said, "Aw just leave it alone. Encourage them to talk but dont remove either of them." Meanwhile someone else would get hammered. Such BS.
I have a relative that was unscripturally divorced and not living with his ex (obviously) for 5 years. When he married someone else, they DF'd him. 23 years ago now. Not bad.