This movie has practically the same plot of "Unstable" (2012), it seems a remake! Ex husband (Unstable)/boyfriend (The Wrong Roommate) hires an ex-con, gives him a fake identity to tricks the woman into loving her. He lives in the guest house, puts some cameras in the house, is friendly with her son (Unstable)/niece (The Wrong Roommate),he kills his friend and the husband. Try to kill her colleague-friend assailing with the husband/boyfriend car, kidnaps the son/niece...