People who are eating their karma don't do that. They just find another doormat who will put up with them or they end up in a karmic relationship.
A man was a player and broke many hearts. He finally got married to a woman who was attractive, educated, and the breadwinner. However, the wife was very abusive by cheating all the time and ordered him to take care of everything in the house, including raising the kids. It caused his health to deteriorate, which made it even more difficult for him to leave her. So which one of them is getting karma? Probably both. They are each other's karmic. The wife is obviously not happy with him, which is why she cheats all the time. She probably wronged a lot of men to end up with him.
The couple's situation sounds unhealthy and dysfunctional, and both individuals may have contributed to the dynamic in different ways. Their behaviors can be more accurately described as a lack of moral compass or moral values, rather than being a result of karmic consequences.