A stolen life

My name is Ashley, my older sister is just a year and a month older than me and is named Audrey. We have an older brother named Amir. I, Ashley, am 17, my older sister is 18 and our older brother is 21. We come from a family that is not very rich but still manages to provide for itself. My sister and I are not twins but we are as alike as two peas in a pod with the same height. I love my sister very much and she loves me very much, or at least that is what I always thought.

Will jealousy take over my sister and our sibling relationship?