Nick, Charlie and her

This is a story about a seventeen year old girl named Mindy who used to be Nick's best friend but sadly moved away she came back three years later because her parents are going out of town and Sarah (Nick's mom) said she could stay with them, but Nick and Mindy don't have a normal friendship either, this story takes place a couple weeks before the Paris trip so Nick and Charlie are already dating why not add a girl to the confusion.