Summer is like Mom, Morty is like Dad but more in control than Dad. Grandpa was a control freak, he chose Morty because he had better control, and Summer, like his mother, made him reluctant to tell her the truth, so she had to let her experience it for herself. Grandpa and Jerry have been fighting for the right to speak in the family, but due to various reasons, J has not been driven away. (I think J will come back, otherwise the grandfather ruled the family and won't be entangled and not good-looking) And Mom has always been good at self-anesthetic: from her marriage to her children. When the robot left she said: Don't go, or we'll never end this game.
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