It's based on a very high probability, they might even be betrothed to each other, at the right time, they'll get married. She'd be well fit to be his wife, and he'd be well fit to be her husband.
..All these were just based on probability, what Aiden was thinking, and the possibility that they were true was very high.
As the boy was walking off, he was glancing at Lucia, and Lucia was glancing at him as well as they kept smiling at each other. And the thought that ran through Aiden's mind was,
'Wouldn't the smiling stop? Future couples'.
..And Aiden noticed something else.
Coming out of the carriage, the boy was holding a bag in his hand, as an ancient bag does look. It seemed exactly like a school bag...the boy was most likely a student just like him.
It was based on a very high probability, the boy and Lucia even seemed like his age mate, so they were most likely students. And they'd most likely be attending the same academy as well.