Antinous has a son au - Extra info
From the start of Kryos's life, Antinous would sit by the shore and beg ask for Poseidon to come back. Being polite wasn't his strong suit but he tried (plus he figured demanding a god to pay attention to you wouldn't turn out well).
Antinous wanted to scream, shout, cuss Poseidon out for breaking his heart and leaving him...but he partially blamed himself. He was stupid enough to fall in love with a god and paid the price.
Kryos was always in his arms when he sat by the shore but too young to understand what his dad was doing.
After Anti would put Kryos to bed he would cry himself to sleep. Please believe Antinous felt pathetic for doing so. He would attempt slapping himself (or other means of self-harm) to make himself stop.
"Crying like a heartbroken widow, get yourself together!"
So, yeah, lots of pent-up emotions in that despicable man.
(Also, I HC that Antinous had an abusive father and therefore that's the reason he doesn't hurt Kryos. He remembers how he felt and doesn't want HIS son to feel that way.)
Don't worry, He's still an ass and I'm not asking you to feel sorry for him.
Antinous has a son au part one