My mate is Alec volturi (a renesmee Cullen sister story)

Aphrodite Belinda Cullen is the little twin sister of renesmee not wanted by her parents she is adopted by Rosalie and Emmett and is perfectly fine with it named after the goddess of love and her middle name meaning very beautiful she lives up to it she grows a lot slower then renesmee but is a little bit more vampire then her what happens when the volturi come because someone thought renesmee was a immortal child? When Aphrodite has to go live with the volturi as she is the mate of Alec volturi