What if Charlie had another daughter and a son and his daughter was his favorite?Meet Izzy Layla Swan.The sweet,bitchy, independent,sometimes nice,proper,popular, hot 17 year old girlfriend of Carlisle.Iz has been dating Carlisle since she was 15 years old.Layla is a Banshee and that's how she met the Cullens.She had to scream so she went for a run and passed out and Rose found her.Lay has a twin brother named Archie.Lay and Archie's mother was Charlie's mistress.lay has lived with Charlie since she was 2 months.Charlie knows about Carlisle and Izzy,and about her being a banshee.What happens when her sister comes to town?And how will they act? All rights to the owners of twilight and the wonderful Stephanie Miller