So i live with my dad and i have a 32 year old sister (im 20) and she has a son. When she comes with my nephew over she takes my stuff and my nephew has broken numerous things like my tv, my xbox, my computer, and she will take stuff from my room and not give it back when i ask her to please stop. shes the oldest and a bully. I Cant do anything about it because my dad lets her in the house and doesnt keep an eye on things. She is a bully to him too.

I have asked my dad to please stop letting her mess up my stuff and he agrees until she shows up and he doesnt do anything about it. im going to be honest im scarred of her. shes not dangerous but intimidating.

Well today we were going to go on a trip and she insisted on bringing my only comforter to use at the beach and i told her no and she blew up and told me i cant go, my mom supported that and they left without me. Now im very distraught and just so upset, i feel like im backed up into a corner and i have nowhere to go and i cant deal with my anger i feel like im out of control and i cant stop hysterically crying. im so upset that my mom went along with it and my dad wont stop her from coming in and i just have nowhere to go. I cant deal with it. what do i do?