That is what stays with us, is it not, the souvenirs of pain, those recollections that leave us with verbal or physical tics, and those precious, rare, tiny moments we all hoard, the things that get us through our days.
I loved watching Petunia discover her 'lost luggage' is not the calamity or catastrophe she once imagined, but that which is (finally!) allowing her to accumulate things better suited to her new truths.
I also really appreciated how you never allow her to consciously accept it is not too late for her to be truly happy. She's the sort who doesn't believe it's possible anyway (a trait she, ironically, shares with that 'awful boy' who was friends with her sister). Petunia is one of those people who the truth always astonishes, but then she's grown accustomed to it blindsiding her all her life. You left me pleased for her, as she enters this new phase of life, full of hope and the rich promise of genuine happiness. Thank you for showing us her journey.