Typically, a man, and especially a husband, would have:
authority over his wife, but Lady Macbeth seems to have authority over both Macbeth, and even the castle, Dunsinane, that they live in (she calls them “my battlements”)
agency to act as he pleases, but Lady Macbeth influences, or even manipulates, his actions in the first two acts of the play
Interestingly, this role reversal incrementally switches back to societal norms over the course of the play:
As the play progresses, Lady Macbeth has less and less authority over her husband
Macbeth begins to keep secrets from Lady Macbeth (the assassinations, visiting the witches for a second time) and having increasing agency
By Act V, he assumes the typical, dominant role of a husband, and Lady Macbeth is reduced to a feeble, powerless wife