you were The countess (Mrs march/Elizabeth) kid. You were on the early teens side. And your mom got married which mean you had to move into your dads place. Aka the hotel cortez. The countess forgot to tell James about you. So when you showed up it was quite the surprise. For him.

James: well hello.... Young one? What are you doing in the hotel cortez? It's not made for kids.

you job is to explain to him why your here not me XD