I know you have your own headcanon for Peppino's siblings, but hypothetically, what would his relationship with Maurice be like?
OOOOH THIS IS SO FUN i'm gonna draw him hang on
I gotta think abt how Maurice would fit into Red's life but TL;DR he'd disown himself from the family because he thinks they're all a bunch of idiots
He's just such a nasty hurtful guy that Red wouldn't even want to remember him as a family member at all. He'd basically be a second Madre (and if we know anything abt Red's mom she's a wretched woman). His siblings know their relationship is sour, so he's not mentioned much even inside their family circle. I'd say they haven't spoken in over a decade.
Maurice would definitely be younger, probably the youngest of the siblings, and projects a lot onto Peppino since they look a lot alike and has Youngest Child syndrome, seeing Peppino as a waste of space and bad role model. Definitely a big source of where he got his anxiety.