Summary:

Oh, he’s not gonna like this, but he knows how to let Shane know that Hayden will be welcoming to Lily. He grabs his laptop off the coffee table and looks up transgender athletes. If he can subtly drop some facts here and there, stuff that’ll stick in Hollzy’s insane memory for anything sports-related, Shane will start opening up about Lily before he even realizes he’s doing it. Hayden will—what’s it called?—classically condition him. Fucking take that, Pavlov.

Hayden sees a picture he shouldn’t have seen, comes to some interesting but well-meaning conclusions, and maybe learns some stuff about himself along the way.

Or, according to Mx_Cryptid on Ch. 4, "Hayden allied too close to the sun and cracked [his] own egg. Poor baby."