We talked about it with his side of the family for probably 18 years or more. It didn't make a darned bit of difference that I can see. He has a brother in law that wants to call it sin based on his wishful reading between the lines on passages. His three sisters really don't want to talk about it....or even tell their children about their new little cousin.This is a good question for all the potentially polygamous men out there to consider prior to adding a second wife.
Men should probably talk about Biblical polygamy with their extended families and friends prior to actually choosing to do it. It's an uncomfortable subject, but is less awkward than introducing your second wife to someone who has never even heard about Biblical polygamy.
You can't reason someone out of a position that they didn't arrive at through reason.
Emotional outrage will be stronger then their "reasons."
Just count the cost.....and assume most friends and family will be lost to you.