Midnight bite Aussly

What if Bella and Edward Cullen had another baby after Renesmee and named her Ally but when Ally was born Bella almost died again but if Ally was not breathing Jacob had to turn her in. Ally was a vampire/werewolf hybrid and the voltory wants her.
Meet Austin Moon a werewolf adopted by Jacob when he was a pup after his parents died when Austin meets Ally he was set by Jacob to follow her and protect her when Kira (Jacobs Sister) Ally's protector had to go to school.
Many wanted Ally to follow them because she was the most powerful Creature at the moment and many want her destroyed. When Ally and Austin start to fall for each other what will happen? Will the voltory get Ally?