Even in the dim light she could see the flush of his cheeks. A nod was the response she got. Antonin had almost unlimited resources thanks to his proximity to the Dark Lord and his high rank in the regime. If he couldn't find her during that time, it was because she didn't want to be found. It rankled Hermione's nerves to discover that his affair with Ginny clearly wasn't just a one time fling. There probably had even been actual feelings involved.