My sister is a Vampire

Victoria and Kate are sisters, very close sisters. until one day a tragic accident caused Victoria's "death" it took a long time but eventually everyone got over it, except for Kate. now 2 years later Kate and the rest of the family are moving for Robert's (Kate and Victoria's dad) new job. But Kate can't stand to leave Victoria behind (even if she is dead) so Kate digs up her sister's coffin intending to rebury her at their new home. Only to find Victoria very much alive and a vampire?!