Dream About Sister Using Drugs

So I had a dream last night that me and my little sister were living together. She was around the age of 18 so that would’ve made me 26 years old. It seems we were living together in a house and I was watching over her. kind of like I used to do when we were younger. our parents didn’t seem to be around either. They didn’t live in the same town or they had passed away. I’m just not sure where they were, they just weren’t in the picture. one early morning while I’m still asleep she comes into the house with a group of friends and they’re laughing and carrying on Because they’ve been out partying. she comes into my bedroom to use the bathroom and I sit up in the bed and I look at her and I say Melody sit your butt down. She sits down and she’s laughing and giggling and I look at her and I say what the hell are you on? Now this is the part of the dream that is surprising to me, because in real life, my little sister watched my father, my mother, me and my little brother, all suffer, while using alcohol and drugs, and she completely chose another life free of substances. In the dream, She is higher than a kite and I am pissed off. I get up out of bed and I go over to her and I tell her to give me whatever she’s using and she’s so out of it that of course she’s resisting me. so I start searching through her Jean pockets and I find this little plastic baggie of some kind of drug that I don’t recognize and I ask her what is this? what is this? and she is too incoherent to answer me. I go out into the living room, and I tell all her friends to get the hell out of my house And that Melody is not coming with them. I’m not quite sure what happens but she somehow gets back out of the house I guess after I go back to sleep and when I realize that she is gone after I awaken, I go over to one of her friends homes and all of them are partying over there with the adult mother. I go over to the mother and I look at her and I say, why are you letting these kids get high like this and party like this? I just didn’t understand it and I was angry that as an adult she would allow this to go on under her roof. Then I wake up.