She often saw living human beings being bitten or scratched by those walking dead. Those human beings would die, then become walking corpses themselves and wander in the world.
She didn't know if she would turn the others into zombies too, but she felt that she was almost the same as those walking dead.
But now, she had company! She wanted to keep Wu Yueling, and she believed that she would take good care of her.
She didn't think whether the child's family would worry, neither considered what she should feed her with. She felt that the things which were edible for herself were also edible for the child.
She was so happy now because she didn't need to go everywhere alone anymore. Before, she was only able to hide in the places that human beings couldn't find, and curiously watch them. But now, with the child, she wouldn't be bored to the point where she had nothing to do but count the ants by the road.