Ok, so ive been trying to find this movie for years. I watched when i was a little girl. All that i remember is it was a movie from the early 2000s. Its a movie about a young man who was always getting into trouble as a teen. He had a half sister who was deaf and they were really close. Their parents always favored her over him. One day she kisses him on the mouth. And things got weird he was obsessed with her. I remember there being scenes near a dock or harbor. And i remember lots of scenes of red and black. The last thing i remember is in the end he murders his half sister. I believe by stabbing. Please tell me someone know what im talking about!