I only ever read the first part of this story, where Isabelle shows up, so I'm glad you linked to it from your new fic (which I'm about to read). Although, just a suggestion: linking to part III of a story, when that part has no links to the previous parts, makes it a little hard to backtrack to the beginning.

I love Alison Janney, and I love the idea of her as a bossy, overly competitive big sister. I really like the mystery she presents to the WC team, and Neal's perceptions of her interactions with Peter.