Her renewed sobs was all the answer that Hermione needed. If she was ordered to kill her brother or her daughter would be murdered instead, how was she able to do anything but kill Ron? Hermione couldn't blame her. Truthfully, she couldn't blame her for anything she'd done. Not in the name of protecting her daughter. She knew that if she was faced with the same choice, she would do whatever was necessary to ensure that Oliver was safe. Maybe that was a relatively new feeling for her since she stopped taking her potions and actually gotten to know her son better, but it was still valid.