"Do I really need to try all of them on, Uncle?" Anna asked. She only tried three dresses and she's already tired. She can't believe that trying on these dresses can be so tiring. "I thought that all of these are already in my size?"
If her uncle Alfonso already decided to have her as his model, then there shouldn't be a problem knowing her size, right? Her uncle Alfonso is up to date on her sizes. It makes no sense for her that her uncle Alfonso is making try all these dresses.
"Yes. I do know your size. But sometimes, when you try on a dress you will that there is something you don't like about it." Alfonso understands that it's too much for Anna, but he needs her to put up with him because if they don't, Anna might feel discomfort when the runway show starts.