She stops explaining. In any relationship, the person who explains themselves is the subordinate. She no longer justifies her schedule, her spending, her friends, or her feelings. When her husband asks, "Why are you late?" she smiles and says, "I wasn't." That is not a lie. It is a redefinition of time.
The honest answer is grim. For some women, this modification is the only path to psychological survival. When divorce is too dangerous, too expensive, or too socially annihilating, the diabolical wife becomes a secret agent in her own home.
The new wife’s goals are no longer relational (love, respect, partnership). They are operational (peace, leverage, exit capital). She is not leaving tonight. She may not leave for years. But she is building the ark while pretending to enjoy the rain.
And if you are the partner of such a woman: do not look for drama. Look for silence. Look for the days when she stops arguing. Look for the moment she stops crying. That is not peace. That is the sound of modification.