Whoa, I gotta say, that was a real shocker! This is one of the most complex moral dilemmas I've ever witnessed. It's a tough call to make, saving someone who you only view as a replacement for a lost loved one over the entire human race, who you'll never even cross paths with. He was afraid that she would make the selfless decision to sacrifice herself and leave him, so he made the call for her. But in doing so, he's forever changed their relationship. It was a fleeting moment of genuine tenderness and sweetness, but now it's built on a falsehood. You can see in her eyes that she doesn't fully believe him and senses that something's not quite right.