The Blade

In the Caravan you find a man who, From his weapons history is a piece of shit, and a child who is near death, after killing the man,( You DO have morals) you check on the child to ensure that they still live, and to your surprise, they do, but not for very long. You could save the child, but doing so would bind them to you and vice versa, or you could leave and hopefully be rid of the pulling sensation the child gives you,
WHAT TO DO?