She told you this older man was not taking her insistence on sleeping somewhere different than he was as an answer. He wouldn’t take her insistence on not sharing food with him for an answer. He keeps insisting on breaking the professional barrier and contacting her on her personal phone at night. When she responded the next day via work email, he did it again. When she made her boundaries known, he refused to accept them and started acting as if he were upset with her.
Holy shit. How can you not see how wrong this guy is? And you’ve never been able to tell when someone is clearly trying to flirt/express attraction in you? Maybe that’s never happened to you. But it’s a not so subtle change in behavior, and she noticed it.
This man took personal information he wasn’t supposed to know about her, and tried to talk to her about it—again, outside of company time and through personal means.
If you don’t see what’s wrong with it, you don’t want to. And I’m scared to know how you’ve treated people.