Basically their son, Lennok, caught Arok and Kloff in their bedroom at night when he was supposed to be asleep and Kloff was being yk, rather rough with Arok. Lennok thinks Kloff is hurting his Mother (he calls Arok “mom” in the novel”) and vows to destroy him. He had a whole section on the novel called “On why I hate my father”. He does a bunch of kids shenanigans (He’s 7) trying to take revenge on Kloff but in the end he does love his dad but he doesn’t understand why he was being rough with his mom. Kloff doesn’t explain what happen ofc, but he explains their bond and how it affects their relationship, which is something that does help Lennok understand his parents a bit better. And despite everything, Kloff is really a good dad and even tells Lennok “If you saw something in my that you didn’t like, change it. I want you to be better than me” and Lennok decides to give up on his revenge. But he calls his dad “King Demon” and acts really mean towards him, it’s so funny.

It would be fun if their children has this unexplained hate for their own father lmao. Sorry, I just hate kloff