I love this scene. Because I think V knows that she honestly is sorry and honestly regrets what she did. And V knows that. But I think if others tried to apologize and didn’t truly feel that, he’d know, and it would be meaningless. She knows she has to die, knows it’s her penance for the things she did and for the lives she ruined, and she’s accepted that. He knows this. And therefore her apology absolutely means something to him.