"I never said you were!" She told him, under hiding arms. "I said we both weren't third years." She shrieked when he decided to throw the cauldron along with the water.
And she panicked for a second when she saw it was on Alfie's head.
"Oh my goodness." She reached for it, tugging on it as gently as she could. "You, get out of here, or you'll get the Bloody Baron's wrath you will." She scolded Peeves. "I'll try to get this thing off, this is a bloody sodding nightmare."