Rose was frozen for a moment. She didn't think she could understand all this, not really understand. Not the way they did. And they deserved a moment to take it all in.
But then, she remembered what it was like to see Earth end; to watch her home burn while she felt so alone.. until he was there at her side. This was a happier moment, but strong emotions weren't any better when they were experienced alone. Rose stepped up between the Doctors, taking each of their hands.