Fantastic Five (fantastic four fan fic)

What if Ben had a little sister named Madison and what if she and Reed were best friend too and worked very closely together?
Well this is a story of change, acceptance and love.
This is Madison's story. Madi's always been basically invisible to everyone besides her brother, Reed and her long-term on-again-off-again heartbreaker male model boyfriend Damon Summers, who is ready to finally settle down with her, but does her heart belong to a someone else? And when the mission takes a turn for the worst and herself, Ben, Reed, Susan, Johnny and Victor are changed, in the end who will Madi have?