Purebred cat adopted the kitten and began to care for him like a mother. She cares for him, teaches his cat’s habits. The cat who became a mother, begins to follow other instincts.
She may think that even You, its owner can create a threat to the kittens and to protect the nest, even from You. And to wonder what she’s going to go next and to prepare for the shot, when others take the kittens in his hands, just not worth it.
Totally typical behavior of a cat-mother, feeling even the imaginary threat, to move all her kittens to another location. It is useless to punish, make her nest cozy and safe and not disturb her in vain.