Oh but it's so tempting ...

Why is it that on the nights when I have a mountain of work, The Teen decides she simply must practise piano for two hours. Same piece ; over and over again. I wouldn't mind but it's for a recital at school which she's known about for some time and has only returned to the piece this evening!
An agonising evening - the irony of the title of the piece was lost on no-one!