What really happens there, if you ignore the author’s spin on it and concentrate on the facts is Sheryl is repeatedly asking her pregnant employee to please come stay in the big bed in the private jet and rest.
Then author has good points, such as Sheryl not taking into account she’s expecting ready deliverables. But she also spins it as if something sexual might happen there, or that Sheryl saying “you should have slept in the bed” in the end of the flight is a mafioso threat - and literally suggesting that Sheryl stopped trusting her because she didn’t take that offer.
(Worked at Meta for many years, not directly with Sheryl, and I am generally a fan of her, I think the book distorts at multiple times the messages she said)