Is it permissible for my wife to stay overnight at her aunt's house without my permission and knowledge, given my dislike of that?

A wife must obey her husband in what is right and lawful. If your wife spent the night at her aunt's house without your permission, then she is disobedient. Explain this to her and remind her of the husband's rights and the obligation to obey him. If she persists in disobedience, then admonish her. If admonition does not work, then forsake her in bed. If forsaking her does not work, then strike her with a non-violent blow.