Control
A vital element of any successful relationship is reciprocity – being able and willing to both give and receive. This also sometimes means relinquishing some control to your partner and trusting that they have your best interests at heart.
Clearly, this woman believes that any moment of even the tiniest bit of fragility and vulnerability will be used against her. While the mind-control theory may seem far-fetched, the sentiment behind it seems to stem from a lot of real pain.