What if Gwen had gotten her way?
Lets say Kalabar didnt exist and they made it back home witout trouble, ((yes I know. It would be one hell of a boring movie) and Gwen still refused to let Marnie "become" a witch, casusing Marnie to lose her powers forever.
What do you think their relationship would be like?
I think it would be espcially bad since Marnie was only 13. It´s not like she can move out any time soon, and she is becoming a teenager. Something that is streesfull and hard enough on it`s own.
Alternatively, what would happen if Marnie found out she had been lied to etc, when she was say 18?