The loss of credibility occurs when the husband lives with a compromised conscience in patterns of impenitent sin. He is not wrestling with honest weakness, but being dishonestly duplicitous and hypocritical. His leadership has no moral platform built into the conscience of his family. He loses the moral leverage needed to lead. His subordinates lose respect and resent any obligation to have to honor him.
Intimacy erodes along with the receding credibility.
The resentment, perhaps, justified to a degree, soon becomes bitterness and the wife beings to retaliate and punish. She may try to manipulate him or deny him emotional or physical intimacy. Her response is now very much part of the problem. There are women who simply refuse not to be continually angry. Death is working its way throughout the fiber of the relationship.