Responses
You know you have a point that's true typically 17-18 in better societies and lower in others...if she married around then she wouldn't be that old with 20 something children. Somehow though I think even if she married older the one thing she was blessed with his not looking her age...I mean she has such an inferiority complex and unchanged a high degree of power hunger that her looks are the only good thing about her. Ironic enough even her son that resembles her in looks an viciousness is more clever than her!
Everyone talking about how young and pretty the mom looks, but remember she's probably only in her mid thirties. It's normal for women to get married/start having children in their teens. So assuming the mother married the duke at that age, she'd only be about 34-36ish right now.