In the upcoming thriller flick, J.Lo plays Claire Peterson, a married high school teacher who makes the mistake of sleeping with the hot high school-aged boy next door, Noah, played by Ryan Guzman.
"God, you're beautiful," he says in one scene, going on to apologize for flirting with her. "It's okay. It's the nicest thing anybody said to me in a long time," she says back. "Well then, I'm glad I said it," he says with a sly smile, before continuing to seduce her.
As if that wasn't bad enough, it turns out Noah has a crazy side. When Claire tries to cut things off with him, he starts obsessing over her, threatening to expose their secret to her husband (John Corbett) and wreck her life.
For starters, Noah prints out a ton of photos of their steamy night together and puts them up all over her classroom while the school is closed. To Claire's horror, she sees them just as she is about to start her school day. And that's just the beginning of the trouble Noah stirs up for her.
The Boy Next Door hits theaters Jan. 23, 2015. Check out the full trailer in the clip above!