Peter did not seem peachy. Not at all. But Lily certainly wasn't going to press him in the middle of a muddy field and operation prep. With so many things going on, and him looking that wobbly, she wasn't even going to ask questions. (They could wait until she had a spare and private moment with James later.)
So instead Lily just turned her back on their other two friends being... very friendly, and walked alongside Peter toward the rest of the Order crew. She eyed them--with their brooms and their excited faces and their wild ideas--and sighed. "We are friends with some real lunatics, aren't we?"