They really haven’t been great parents. They kept so many secrets and ostrichized him from the family with Liths secrets. In the earlier chapter i think it was mentioned that Raaz just let Trion tend a random field and forget about him. I also blame Lith here, the kid obviously felt guilty. Even if not in character Lith had every opportunity to smooth it over with his brother as the mental brooding adult. Trion probaly would have been fine then , as a kid who just followed order from a higher authority(his brother) probably wouldn’t t have the courage to apologize. I hope Trion becomes a great person to help Lith see people can change and sometimes deserve second chances.