Fucking My Step-Sister Good Bye Before She Moves Out. The tension in my house has been really high, my step-mom and step-sister have not been getting along at all. I was about to go ask my step-sister something when I found her writing her goodbye letter to my Step-Mom and the family. She is gonna go stay with friends, she can not stand one more minute in the house. Gabriella and I grew up together, I can not believe she is leaving. We start to remember...