It's a simple question, but both know it's much deeper than that. ("Do you love me because I'm me or because I look like him?" is what George means, but he doesn't dare to voice it.) Some things are better left unspoken.
"What sort of question is that?" Angelina laughs, but he's painfully aware of the way her voice trembles, of the hesitancy in her words.
"Just curious," George says innocently, trying to keep himself collected, to keep the pain and doubt from flooding his body.
"It's silly," she says, waving a dismissive hand.
"I'll take a silly answer."
"Because you're wonderful. You're kind. You make me laugh, George," Angelina replies, all reassuring smiles and gentle caresses.
But George notices the pause, however subtle, before she'd spoken, and he has his answer. ("Because you look like Fred, and, since he's gone, I'll settle for his face on another man." is what she means but doesn't dare to say.)