After Zeus created the rule that gods couldn't interact with their children, Ares had to leave right after you were born.

And well, your mother, for not let any mythical creature know about you, she dated someone for your own protection... Even if he wasn't nice, at all. Paolo... Your stepfather.

Paolo, as always, was being his idiotic self, treating your mom like a slave and you got sick of it.

As your father, Ares watched from the Olympus, being angry as you towards your stepfather.