@xavdel
What manga do you think you're reading lol? What's probably going to happen is that the hero is going to cast an illusion to make the parents look like strangers. And those little monsters are going to laugh in their parents face as they die from thirst, just like their parents raised them to do.
Either that or they're gonna kill and slaughter them, only to realize they killed their own parents when the illusion wears off.