The movie was probably from the early 2000s. In it, a blonde teenage girl lives with her little brother and dad in a creepy house. The mom is in an insane asylum. People start dying including the girl’s boyfriend. The girl hears weird noises from the attic but her dad keeps stopping her from going upstairs. In the end it turns out the mom sent someone from the asylum to keep an eye on the family. I remember someone (maybe the dad) falling into a booby trap the crazy guy made. Also, the girl had a birthday party at the house. Her and her boyfriend were in the attic making out.