Anna spends a lot of time at home, in case Elsa needs her. She cleans and cooks and doesn't impose.
No matter how bad she wants her own comfort, Elsa is the priority.
So, she swallows her fears and trepidation and just makes sure Elsa has something to eat, and can see a friendly face. They haven't talked about it yet. Any of it.
But... late at night, when everything is still and silent, the little fears begin to trickle back in.
She can't replace all that Elsa's lost. How can she even begin to try?