Van someone explain the relationship between Nick and Ash? They just hint it at some point...

I’m re-reading this again, and I’ll gather what I know-

It’s not obvious but this is based on a light novel, and that light novel is a spin off of Nick and Kyle’s relationship. grandpa and Lyle might have had “antagonistic” roles, while Ash is one of Nick’s friends.

From context clues alone, it looks like Lyle was sus about their friendship. Cause Nick is an Omega, and friends with Ash an Alpha. “Your dating my brother why are you with this hot alpha?” Kind of scene- I think he did a bad assumption out of his over protective love for his younger brother.

I’ll edit this if I figure more out.

Thanks!