I don’t know about the methodology here but I’ll offer an anecdote:
My husband plays in our local church softball league (men only). Our Catholic church team is made up of families. Dads play while moms talk and kids play around. Most of the Protestant churches have baby mamas and boyfriends. Boyfriends play while their girlfriends talk and illegitimate kids play around. It seems the churches we play love the sinner and the sin. This is the tristate area of the Ohio Valley.
Please, this is anecdotal only! I’m sure everyone can claim an experience just the opposite!
We live in the same general area, and I know exactly what you’re talking about, however, Baby mamas and boyfriends don’t explain how more marriages end in divorce. These folks aren’t married in the first place.