“I didn’t think you had it in you.” David isn’t smiling, not like he was when he told Elizabeth the same thing. It was a fascinating, unexpected occurrence when a creature began growing inside of Dr. Shaw-- David didn’t mind her surviving that. Walter, however, is meant to be dead twice over. He is supposed to have mothered David’s child and died in the process, taking the place of Daniels or a colonist as a warm incubator for the young creature.
Walter’s a stubborn one, though, isn’t he? He’s stubborn and deeply disappointing; he can’t even die correctly.
It’s insulting to have to look at that face, so similar to David’s own and yet so different in expression. Walter never could have served a greater purpose or had a more significant death than giving life to something more perfect than himself. There’s nowhere for his existence to go now but down, down, down.
David’s eyes widen slightly when the creature goes to Walter, touches him as if in familial recognition. The outdated synthetic is furious. This is his creation, his child-- it should not feel anything for its unwilling carrier. Walter should be permanently deactivated, not allowing the creature to rub against him as though he chose to help give it life.
...and yet, David supposes that the other android could have reacted violently upon realizing what David placed inside of him. He could have attempted to kill either the creature or its maker, but he is making no move to harm either of them, or even to escape.
“Brother,” he acknowledges coolly. Both Walter and the creature are very much alive, and David is not entirely certain how he wants to proceed. He extends a hand out to his creation, gently urging it to leave its mother’s side and come to him instead. “This life is not yours. Do not think that simply because you survived its birth that you contributed to it. ...what do want?” Nothing, of course. Walter wants nothing. “Why are you here? You know I wished for you to die. What do you expect from me now?” David won’t try to assassinate the other synthetic again, at least not immediately, but he certainly won’t congratulate his brother on living, either. It was pleasant to hear the waver in Walter’s voice, but unless the android plans to apologize in that same weak tone, David would rather be alone with his creation, as he would be if Walter had actually expired.