London: (To Maddie) When I become the owner of this hotel, you are so fired!!
In a future episode, London fired Estaban and when he said, "as the bellboy or the nanny?" and London answered, "as the nanny", it implies she already had the power to fire employees, so couldn't she have fired Maddie anyway?
London hired him as the nanny, so she can fire him from that, and she can have her dad or Moseby fire him as the bellboy.