The Mute Cullen

Alexis Cullen...She is Mute.Shes mute because of her past,her past has been worse then any of the other cullens.The only person she ever talks to in the Cullen family is Jasper because he understands some of the things shes been through,and she talks to Edward...not willingly he reads her mind but she has very depressing thoughts.Alexis doesnt go to school with her silblings in fact no one but the Cullens know about her.She is very very powerful she has many powers.Shes so powerful even the Voltuir are scared of her they would never admit that tho.But what happens when Bella notices a room shes never been in at the Cullens? What happens when shes goes in that the forbidden room even tho Edward told her not to go in there?
What happens when Edward asks Alexis to go to La Push with Bella to make sure Bellas safe? What happens when Alexis Agrees? What happens when a certain wolf imprints on her?