When the TARDIS stumbles back against him, Gabriel reflexively wraps his arms around her and holds her up as she trembles with pain and rage. Why he can touch her now when he could before he doesn't know, but he's relieved to have some level of control here. Maybe now she'll believe him when he says he really is here with her.

Her anger at the man threatening her is palpable, and he finds himself angry too, fed by her emotional feedback through their tenuous psychic connection in addition to his own outrage at someone who might gleefully harm her. He can't say that he's sorry that the man will die, but he is surprised at how satisfied the TARDIS is by that knowledge. He had thought that she might feel some regret at the loss of a life, even if it was one such as that.

He loosens his grip on her, and asks, "Did you kill him?" though he's not sure that he wants to know the answer.