Can an Adult Bully😡 learn to stop bullying?.

Of course. Although, after the divorce she may just find somebody else to bully. >:-/

An adult bully may stop being a bully when the other person knocks him silly a few times and then they may change. I've found it to help most of the time. Give them back some of their own medicine and generally? That works !

Not often ... Usually, the "bullying" escalates until their victim winds up in an intensive care unit - or dead.