Antonin was still gone from their home when there was a distinctive knock on the back door just after sunset. She was given permission to adjust the wards protecting their home for one reason and only that one reason. Checking out the window that the two men standing just inside the shadows were the two she was allowed to grant entrance to, Hermione removed the wards only from the back door. There was a legitimate fear that someone might be watching their home and waiting for the moment when the two wizards arrived to make their attack upon the house. Her heart pounded in her chest up until the very moment she was able to close the door behind them and reapply the enchantments.