Hi guys, My dad is currently in afghanistan and I am left alone with my big sister at our house. There is something wrong with my sister. I went into my house yesterday and I heard noises coming from her bedroom. When I opened the door she was squatted over her bed, screaming and masterbating very violently. I looked down and she was had shit on her bed. When she saw me at the door she looked at me and started flicking her tongue in and out and she had a glazed look in her eyes. I am currently staying with my mum and I have not told her about this. I dont know what wrong with her. It might be exam pressure from her university studies as she was not like this before.