Some years back, the story was posted here. I think there might have been a question on this forum about it (also years ago). I can't search up either the story or the request here, which I think means I'm using the wrong keywords.
Anyway, a female executive is assigned a new secretary/executive secretary/personal assistant/whatever that is a young man. He takes care of her, including personal needs (coffee, dinner, etc.) and gradually comes to dominate her in her non-executive life. So she ends up being submissive except when in the power suit behind the power desk, etc.
Ring any bells?