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The Duke is such a dick like wtf my guy they left because they felt suffocated there literally they were better off with the witch than you. You always left to go an fight meanwhile they are still kids just like she said they need to go out and explore being kids because what else other than being there stuck inside their room and in the house all day when all they want to do is just have fun and Play as soon she leaves you will regret it you will try to find her but she won't be there she will move somewhere else where one can't find nor know who she is after you coming back from the mission