Starlight Glimmer couldn't be more relieved that everything ended well for her, Twilight Sparkle, and time itself. Yet despite going through life with a genuine smile on her face for the first time in ages, an ache in her chest suggests that not all is well.
Perhaps she never truly earned forgiveness. Starlight wonders if her reactions were so unjustified to where being forgiven would be impossible. And most of all, she ponders whether the punishment she feared would come crashing down on her. A peculiar letter addressed to her also doesn't help matters.
Her only viable option is to talk with Twilight.