No, really, the Jennifer Lopez affair in ‘The Boy Next Door’ isn’t as creepy as it seems!

Jennifer Lopez’s campy new thriller, “The Boy Next Door,” hinges on a plot point that is, well, potentially problematic.

She plays Claire Peterson, a high school lit teacher who has a one-night-stand with a new neighbor. Awkward enough, but — spoiler alert! (oh, who are we kidding, it’s all in the trailer) — it turns out her new love interest is still in high school.

At her school! The story takes a “Fear”/”Fatal Attraction” turn when the guy, Noah (Ryan Guzman), becomes obsessed with Claire, threatening her career, her family and her life.