To specify the topic some ruler marry a 12 year old girl sometimes even younger. It is not a betrothal but a marriage and I do not get why they are doing this.
I understand what Rifal is saying I haven't a problem with this kind of marriages although I find it slightly exaggerated that the AI marriages five year old girls but I just want to figure if I am the only one who has the experience that the AI does that sort of things or is it normal. In short do your AI players marriage children too?
The AI has nothing to do with it. Neither the AI nor the player can marry characters younger than 14...