The Lost Mate (Demetri Volturi FanFic)
Marcus and Didyme had a child while Didyme was still human. Didyme was turned into a vampire after giving birth to her daughter, Kayli Venus Volturi. When she was 17, she found out she was Demetri's mate. She couldn't have had a better life, but then she saw her uncle Aro murder her mother. She ran away and never to be seen again. What happens when Carlisle Cullen asks her to side with the Cullen family and fight with them? She sees her family again, but she hasn't called them that in so long. Demetri makes it his mission to get her back.