The Wife of Bath offers some insight into her interpretation of marriage. It serves as a sort of warning against young men getting married. She's trying to tell them what they're getting into and to be careful to understand that women are the real rulers of the marriage:

"And when I've finished telling you my tale/of tribulation in the married life/in which I've been an expert as a wife/that is to say, myself have been the whip."

Coupled with her tale, you can argue that she is warning young men about what they're getting into and that women are the true rulers in marriage. Of course, she's been married several times...