A divorced teacher’s night of weakness with the young neighbor who befriends her impressionable son goes all kinds of wrong in this Blumhouse thriller. Here’s the first trailer for The Boy Next Door, starring Jennifer Lopez as said educator and Ryan Guzman as the teenager who becomes obsessed with her. John Corbett, Ian Nelson and Kristin Chenoweth co-star in the pic from director Rob Cohen and writer Barbara Curry. Universal opens the film January 23.