"I can hear the children talking, screaming 'You're a wreak'!"
"If you think you're so convincing, where's your self-respect?"
Nico and Will always had this connection, the I-love-you-so-much-that-our-music-preferences-will-get-mixed-so-much-we-won't-know-who-originally-liked-it type of connection. The only thing they were sure of; Nico was the one who showed Will Get Scared.
It started when Nico sang "Don't You Dare Forget The Sun, Love" when he was in the infirmary to get a flu shot, since Will found out he got sick easy.
After that, they would go to each other's cabins in the middle of the night just to ask if they knew a song the other enjoyed, annoying the Apollo cabin and Hazel so much that Chiron asked the Hephaestus cabin to make them their own cabin, and they still went to each other's breakfast table sometimes.
No one was surprised when they said they started dating . . . or announced they were getting married . . . they didn't even need to tell anyone they were adopting a child; Hazel interrupted her brother as soon as he opened his mouth.
Yes, the son of Apollo and the son of Hades had a special connection that couldn't ever be severed, no matter how hard someone tried.