Person 1: You look like a boss!
Person 2: Becase I'm a boss.
Person 3: Boss of whose?
I want to know if person 3 is using "whose" right or if "whom" is needed to make the sentence grammatical.
Note. I know that I can say "whose boss?" And I be correct. But I would like to know if is even possible to have a question constructed like that and if it will be correct grammatically speaking.
All answers will be appreciated. Thanks...