Sweet Circe, now the tears were streaming down her face!
It took a great deal of effort for him to muster the courage to straighten up and say, "I beg your pardon, but I AM a Weasley and I do not pull pranks!"
He frowned and bit his lip as he watched her shake her head like a lunatic. "Please, you can't possibly think I have anything to do with this when I'm just as lost as you are!" he all but pleaded for her to understand.