Wears the trousers

Wearing the trousers is a reference to a man being in charge and when a woman wears the trousers she is the one in charge because trousers were traditionally worn by men who were traditionally the ones in charge

Blake may seem bossy , but it's Lisa that really wears the trousers in that relationship .

rules the roost

Ruling the roost is the same reference. Birds roosting on a perch have a hierarchy the top bird who is at the top of the pecking order gets the best spot and sits where they want.... they therefore rule the roost

she rules the roost a little too much