This is awesome! I would've loved to see the reactions of everyone when Lily and James did get together. It would've been quite funny and I imagine their reactions would be the way you described it.

essentially, the children they were two years ago had been shattered into a million tiny pieces and rebuilt in a way that made the two children who didn't fit into two adults who fit perfectly together
I really like that line. It just captures their growth and their changing dynamic and how their relationship would and does work.

Great job! Thanks for picking and filling my prompt! :D