Once she was hidden away in the alcove and could turn around enough to get at the awkward rip just beneath her bum Lily used her wand to make short work of it, sighing in relief.

"You're a good son," she said, patting him on the shoulder and stepping back out. "If you must know my robes ripped and a bit more of me was showing than ought to be." Lily grinned, giving her son a nod. "You've saved the day darling, I'm sorry I tore you away from your friends, Poppy was dancing with Hagrid and Horace would try to fix it himself and make a scene. Not to mention that would have been completely dreadful."