Lately, I have been wondering about the divorce rate in the church these days. I have read the all the verses posted. My question would be, what if a believer marries the adulterer, is that believer committing adultery?

The second question I would have is this, (an actual incident) ....a person (man) who was a non believer marries someone else's wife, then becomes a believer during this marriage, gets convicted, and gets divorced from this wife, and she goes back to her original husband, and now this believing man calls himself 'single'...and says that God never acknowledged his marriage because she belonged to her first husband. What do you think about his reasoning? I'm really confused on this matter....thank you...