Somewhat more relaxed by his explanation, she at least wasn't worried that there was about to be a wizard's duel in her bedroom. Rodolphus made it clear when she was living in the Resistance's village that he didn't want her around Draco. At the time she just assumed it was because she was a bad influence who was likely to get him into trouble. It wasn't until much later that she realized it had more to do with his possessiveness and desire that no one touch her instead.