Charlotte and Amber have let things slide, not only have they let their efforts in class diminish, but they have been playing truant too. When they get their end of term reports they are so bad that they decide to alter them and forge Daddy's signature! Daddy never even sees them. Imagine his shock when school ring him at work to discuss the downward spiral of his girls and mention the signed report, and absenteeism. He goes home to give them the bare bottom slipperings they deserve, and makes them stand noses to the wall afterwards to await their Aunties visit for tea, so they too can see what naughty girls they have been.
