Idiom: wear the pants (trousers)
*Note: In British English the expression is wear the trousers.
— My grandma was a tiny little lady but she definitely wore the pants in her marriage.
— We finally broke up because both of us kept fighting over who would wear the pants in our relationship.
— Everyone thinks the director's so tough but his secretary wears the pants in their work relationship.
— I'm looking for a traditional relationship—where a man wears the pants at home.
— It's hard to tell who wears the pants in that relationship.
— I honestly hate conflict and arguing so I let my wife wear the pants, unless it's something I really object to.
— Men traditionally wore the pants in marriages partly because women could not work outside the home, which severely limited their influence.
— Our three-month old twins definitely wear the pants in our home!