Biff, Marty's enemy, never had any sons but only daughters. He had 2 daughters, Delaney Tannen and Tiffany Tannen. Marty meets Tiff, who is Marty's age. She seems to be different and actually nice than the other Tannens. Marty can't help but have suspicions about Tiff, and scared she might do something as bad as the other Tannens. Marty even takes Tiff on an adventure with him.
Rated: T - English - Adventure/Humor - Chapters: 2 - Words: 1,658 - Reviews: 1 - Favs: 4 - Follows: 3 - Updated: 12/3/2016 - Published: 12/1/2016 - Biff Tannen, Jenniffer Parker, Lorraine Baines McFly, Marty McFly