@Micah.Jax Haha I definitely understand. Watching somebody fall away is definitely difficult. For me it is easier, as she is much happier now than she was under my parents roof, even if I don't agree with everything she is doing. As Jon would say, "She is the same." No matter what, she's your sister, and its our job to love siblings no matter the decision.
Come from a place of love and understanding, even if it isn't agreement, and everything will work out. Even if that means that she is going to do her own thing... LOL I still struggle with understanding why my little baby sister would be doing all this, but I know that God has a plan for her so it'll be okay. Everybody's path looks different. Best of luck to you!!