In Fifty Shades Darker, Anastasia (played by Dakota Johnson) gets a promotion and becomes "the boss". Another assistant in the office, who used to be her peer, is now Anastasia's assistant. Anastasia says to her, "I expect you to call me Ana. I don't expect you to fetch me coffee unless you're getting some for yourself. And the rest, we'll just make up as we go along."
This is an exact line from the movie Working Girl, which starred Melanie Griffith, who is Dakota Johnson's mother. Why did the the director or writer choose to include this "in joke" in Fifty Shades Darker? It doesn't fit with the tone of the movie (and the line obviously didn't come from the book!).