We're going to have to assume that Ludwig was a big fan of his mother's hairstyle when he was growing up, because he's decided to take it for himself. It's either that or their hair is so naturally thick and wavy that there's nothing else that can be done with it.
Laurence isn't far from being twice her son's age, but you'd never know that from looking at this. He's only a shave away from being able to use his mother's passport when he's going through airport security.