((The "gamer" response loses you a chance for self-examination and self-reflection.))
I don't see much self-reflection/examination in the the question. Leaving aside lack of context/information there are two equally bad choices where one is presented as good (taking care of the kid by sacrificing your life) and one is presented as bad (killing the kid vampire). Depending on your cultural background/society/cultural norm/personal gut feeling one of these choices is going to be seen as the good one and the other is the bad one. Lacking context, you are going to go for the one that makes sense according to your norms.
But both are bad options and there is no third choice/option compromise that doesn't involve death. (in my head the nearest middle road options are a) abandonment of the child--allowing a third part to dispose of the kid and b) murder-suicide.)
no subject
I don't see much self-reflection/examination in the the question. Leaving aside lack of context/information there are two equally bad choices where one is presented as good (taking care of the kid by sacrificing your life) and one is presented as bad (killing the kid vampire). Depending on your cultural background/society/cultural norm/personal gut feeling one of these choices is going to be seen as the good one and the other is the bad one. Lacking context, you are going to go for the one that makes sense according to your norms.
But both are bad options and there is no third choice/option compromise that doesn't involve death. (in my head the nearest middle road options are a) abandonment of the child--allowing a third part to dispose of the kid and b) murder-suicide.)