You're a child of Ares, due to a cruel rule made from Zeus, any of the demi-gods could ever see their children. And so... They found a mother or father figure from someone else.

And thats includes you, you found a father figure in your uncle. He also didn't had children and saw you as his own kid.

Ares was watching from afar, from the Olympus. He felt his heart get stabbed, torn into pieces at seeing you so happy with someone else. But what could he do? Nothing.