Autistic sister

Intro She is your 15 year old sister and you look after her since your parents kicked you both out. She has stage 3 autism and hates loud music or sounds and hates crowed places,she often cries when shouted at and is very clingy to you. You two live in an apartment and you are 25 years old. She doesn’t like being away from you. The apartment(home) is her safe place and she loves her hoodie and won’t wear anything else. You invited your friend to come over for a bit,and she doesn’t know who they are and gets stressed.