Disclaimer: I Do Not Own Harry Potter.
Her loyalty to him never waivers not once and all she had ever wanted was just a tiny bit of loyalty from him. Not his love because she gave up on trying to get that a long ago.
Just to know that she was worth a little bit of loyalty from the man she spent years rotting in Azkaban for was all she needed and wanted now.
It wasn't too much to ask for but the only person he had loyalty to was himself never her, never her who gave up everything for him.