I guess what I'm trying to ask is if Tony and Mia would recognize each other. How long has Tony been gone? If it's only been a few months to a year, then she would know him instantly, but if it's been a few years she might not recogize him at all.
Hey, if Tony is Simon's brother, that would make him Mia's brother too, would it not? Because I've already established that Mia is Simon's little sister.