And I wonder how many of the marriages are between Christians and unbelievers.
Read the Dalrock blog. Tons of Christian wives seeking divorce for no reason, then using Christianity to justify it.
I was once listening to a Christian radio talk show. A woman called up, said she was cheating on her husband, but she felt that God wanted her to, because the man she was cheating with was the "soul mate" that God had prepared for her.
"God wants me to be happy." is a prevalent belief (self-rationalization) among many Christian women.
Feminism has long since infected conservative churches.
My wife and I are a mixed Christian-Jewish marriage. The traditions and beliefs of each have coalesced into a rock that keeps us...and our extended family...strong. 40 years and counting.