“Bad Stepmother” (*1/2 out of four) was a lame thriller about a brother and sister (Logan Huffman and Sofia Vassilieva) whose father mysteriously dies and they return home to their New Orleans estate where their vindictive stepmother (Kristy Swanson) will stop at nothing to obtain control of their inheritance and family money. Laughably obvious movie should be predictable to anyone from the first 15-20 minutes. Swanson has had so much plastic surgery she is starting to look like Amanda Peet.