She still wasn't completely sure why they were in the woods. He said they were waiting on someone, but he refused to provide any clues beyond that. Not knowing who to expect wasn't something Hermione was comfortable with. It could be anyone. Considering he stopped her right before she could reveal herself to her husband, she didn't think Malfoy was waiting for a Death Eater to come collect her from the tent. More than a few times since she was rudely Side-Along Apparated without her permission she had been tempted to run.