The Tribrid Twins

*Inspired by The Salvatore and Her Guardians by DementedEyeCandy69* Three years after Breaking Dawn Part 2 - Carlisle's friend finds a pair of what she assumes are hybrid twins and immediately calls the only people she knows who have experience with them. What happens when they arrive and find that not all is at it seems? Will Rosalie and Emmett walk away as parents to two children? How will their lives change and will it be for better or worse?