Murphy strikes again

One homeschooling family we know has three children, two of whom love playing music. It's almost impossible for them to walk past the piano without banging away on it and they will spontaneously pick up their violins and practise them. What a dream, children who don't need to be reminded and nagged to practise their musical instruments. But what a recipe for conflict that is when they have a big brother who can't stand music playing, especially when he is trying hard to study for his big exams. Why does life have to be so complicated?