The sister Who vanished Through the window

"My sister was sitting on my bed, saying she felt lonely. I remember moving a pile of clothes so she could sit closer, but somehow she was already across the room. I kept talking about making tea, like that was what we needed to do. Then she jumped out of the window. I didn't see her land. Suddenly I was downstairs and someone was telling me she had died, but I couldn't get past the fact that we'd just been talking. The house was full of people I barely recognized. I kept trying to find my phone to call her, forgetting for a second each time. At one point I was back in my bedroom holding two mugs, waiting for her to come in. I woke up wanting to hear her voice."