Parvati wasn't used to being in the middle of things like this. Well, discounting the fact that her own sister had walked in on a similar (but not the same!) situation with Miles only a month ago. That one time was definitely not enough to make her used to it, and it wasn't a feeling she enjoyed. This time she felt even less control over the situation, especially since 1. last time she wasn't doing anything with Miles and 2. it was significantly easier to smooth things with her own sibling.
"I'm sorry Ginny, I know this looks awful. I should go, shouldn't I?" she said, looking to George. She slid her shoes back on, and went for her coat, hoping to hide her huge blush.