A "brat" personality often demands control. Instead of deciding everything, present two high-end options for hotels or activities. This gives her the illusion of control while you maintain the guardrails [1].
Charli XCX, the architect of this movement, defines a "brat" as "the girl who is a little messy and loves to party and maybe says some dumb things sometimes. She's honest, blunt, and a little bit volatile." summer vacation with a female brat7z new