If Shanks knew, that wouldn't make him any less protective, any less adoring, or less anything. The Uta he knows would never harm anyone, and just wishes to bring happiness to all. She's so idealistic, and it's easier to see that idealism in someone else, like Uta or Luffy, than himself.

"You don't want to talk about it, but why wouldn't they trust you?" Shanks asks as he reaches to put his arm around Uta's shoulders.

"You might find they are more understanding than you might realize."