My question involves a child custody case from the State of: Washington
My mother broke federal laws in August of 2015 and will be facing prison time in 2016 for anywhere from 6-9 years. Because of this, Child Protective Services felt she was not fit to keep my minor siblings in our home, so they were seized...their father signed away his rights to them so there weren't many options on where they could go. And because I am a young adult clearly CPS couldn't touch me. My siblings were in foster care until October until they were placed with relatives (guardianship) across the state. I've only been in contact with them twice since August and my maternal grandmother and I were cleared to go see them for Christmas but for some reason CPS has changed their minds and feels like it isn't beneficial for us to even be able to talk to them, I'm not sure for how long...and frankly I am getting very, very tired of this. I am their older sister, I'm barely 19 years old, I didn't break federal laws and I want to see them! I know for a fact that their paternal grandfather has been able to see them and their paternal grandmother can see them. I have been very cooperative and understanding through all of this but I seriously just want to know if I have any, even if it's a little bit, legal standing as their older sister so I can try and fight for some rights to see them.
Editing for clarity- I couldn't get custody of them because I'm not fit to have custody of them, being as I'm 19 and I still live in the home for the time being. My grandma couldn't get custody of them because she too, lives in the home. I'm not sure if this is one of the reasons why CPS is not letting us see them or contact them.

