I am looking for a movie... have no Idea what it is called though. Only thing I remember about the movie is this. I think it was the girl who caught her step dad/moms BF cheating on her mom, and at the end of the movie she tried to kill him by burning down/blowing up the house. Also the dad/bf walk in on the daughter and her boyfriend having sex. And there is blood all over the sheets. This is all I can remember about the movie... please help! I think it is from the early 90s/late 80s