If she did, it couldn’t have been to any large extent, because it seems like she was immediately afraid of him and knew the situation was bad. If I had a friend who started following me in a car, I would be casually like, “Hey you, what are you doing, silly friend?” And then if he got out and started jogging with me, I probably still would not realize I was in a bad situation until they began to either talk or act in an aggressive manner. Up until that point, I would assume a friend was just messing around. So if she knew him, it had to have been in passing, like seeing occasional photos on social media, if that. But I’m guessing she really did not recognize him at all, and probably did not even realize she knew his sister.