"I'll mention it to my roommates," Lavender said, feeling a renewed optimism. With Ginny having so many troubles with her magic (aka, her magic wasn't working at all) and then Hermione, MIllie's and her own power much weaker, they could use more time spent on building that back up. Even if the other magic users in Marrowood didn't practice their magic in the same way, it seemed a pretty general side effect that their powers weren't quite at normal performance levels. So everyone could benefit from this!
"Speaking of, I should get back. Ginny and Hermione'll be wondering where I am soon." Millicent wouldn't care one way or the other, but in that teeny tiny event that she did care, Lav would hate to make her worry. It certainly didn't help that Lavender hadn't told Millie that she was a werewolf, but they'd cross that bridge eventually.
"Thank you again for keeping watch and healing my shoulder. Are you staying here? We could walk back to the apartments together if you were going to go back to catch up on sleep." She couldn't imagine Emma getting very much sleep with all the ruckus she made as a werewolf.