why doesnt janie share her grandmothers enthusiasm for logan killicks

Logan is Janie's first husband. He is unloving and too old for Janie. He treats Janie as if she were a possession like his mule. He cares for Janie and is upset when he realizes that Janie will leave him for another man, Joe Starks, but is powerless to convince Janie that she should stay with him.