Responses
Maybe because now that she finally became close with the Princess, she thought their relationship is something special and that the Princess also sees her as someone special so she was kinda disappointed that it was not a secret between them anymore.
That's a very accurate explanation!
I can see Jennette getting more and more greedy. I think she feels like everything revolved around her. It's like her against the world or something. Especially her line of "I thought it was just a secret between the two of us". I know she's young and innocent. But that just seems a bit selfish... ╮(￣▽￣)╭