Why is this disruptive? We’re shown heretofore how Annie and Lillian are mostly in the same boat in their single, unattached lives. We’re also shown how Annie’s life is not where she wants it to be career and living situation-wise. This moment comes as a breaking point. Lillian’s life is now suddenly moving in a different direction.

How does this ignite the story? On top of everything else, Annie is now in charge of helping to plan Lillian’s wedding and having to hold sway over a group of bridesmaids around whom she feels less-than.

Note how in this draft, Annie seems uncomfortable even talking about the engagement at all.