Unfortunately, these tendencies do not change. Maybe it was because of the abuse, but once a good girl's gone bad - she's gone forever. The ex did him a solid - even though it probably was out of spite. With only four broads under his belt, the breh really has no idea what he would be in for. Slowly but surely, the woman would start testing his manhood...and he would fail. After, she would try to emotionally control him...and he would let her. Then she'd cheat with an old friend/co-worker/ex etc. He would of course take her back under the pretense of her making a mistake. At that point, she would rightfully feel like she can do whatever she wants and everything would go down hill. He would eventually become a cuck, lose everything he has in a divorce, kill her, and/or possibly even kill himself. Anyway, background checks are important.
Damn that went into a dark place very quickly.