[Vespasian]

It's fairly easy to imagine a 13 old knowing that whatever they are doing is "wrong" but totally underestimating the scale and impact.

Perhaps they were expecting a few harsh words at most and that was a price they were "ready to pay".

"Being mocked by the other kids" and "going a little bit over budget" could have sounded equally bad in their young mind.

It's fair to assume that they didn't intended to hurt their family this much and this is one reason why society severely restricts what people can do at this age.