When I go for my clarinet lesson, the previous lesson always runs over by 5 minutes - it's a child and the mum spends a lot of time faffing around basically. But I only have a 30 minute lesson which is then down to 25 minutes. I know that this sounds petty, but I drive 45 minutes for my lesson (one way). Do I suck it up or say something? And how do I put it without sounding like a dick?