@blob The not actually knowing if that was her father thing was actually a valid point. But kids are disobedient sometimes and cling to adults that are more likely to sympathise with them. Depends on the age though. I more expect that behaviour from a 2-3 year old. My point is, a kid running away from their parents, and who knows, maybe as a rich aristocrat he's more likely to get his servants to catch his daughter rather than himself...actually I don't know enough about the world and setting to say that....
Either way, I think it's convenient to the plot that the boy IMMEDIATELY knew what was going on, and as a little boy no less. I didn't get to the rest of the story so maybe there's a reason for why he's so knowledgeable at his young age, however, for me right now with my current knowledge, he's acting kinda strangely.