The spritis around me

Hey, my name is Alice and im 15 years old. Im living in af big house with my mom and dad og my littelsister Kathrine. Heres my scary story. It was late, me and my family were watching tv. Suddenly the tv stops, it were shimmig. My dad just said "Åh, that stupid tv! It the third time it does that today". I was a littel scaret, it begins to being cold inside. I was just thinking that it's not were something. We all movet to bed, and I could here some sounds downstairs. I were going down to se what it were, but nothing was there. I woke my parents up, and my mom goes into Kathrine to hold eye on her and my dad and I was going down. I could see a sadow, but i wasnt sure. I told it to my dad and he's comment were "I think we should call to someone theres know something about overnatrual things tomorrow honey. You and Kathrine sleep with me and mom to nigth". Now i was scared!! But the nigth were going okay and we all woked up natruly, so i were happy. We calld to someone there knows a lot of things with spirit and can get them away. A hour later, she comes in at door and she was standing ind the living room with close eyes and said some strange words. Suddenly ours widow were destroyed. She said that there were something in the house, a evil thing. A spirit or a Demon. My dad asked her if she could get it out of there, but at the first she would know what the the spirit-demon would with us. Again she said some realy strange words and she stoped. She said that it were a demon and it would have my littelsister Kathrine, because she was the most beautyfull baby our family ever had get. She should be killed by the demon and my family would be rich and get power. But my dad was mad and showed her the door out. We was sitting and discuts the things she were saing, but we would not give my littelsister away, so we called the women back and would here if we could do something to get it away, but we could not do enything, if we were moveing the demon would take with us. We could not do enything, just look down for her all the time and hope theres nothing would happend. But next day i took on a trip with the school and i was home 3 days later, i was opening the door and said "Im home!" But no one answered. I were going in to the living