The Boy Next Door (2015)

Claire Peterson is a high-school literature teacher trying to rebuild her life after separating from her unfaithful husband. When handsome 19-year-old Noah moves in next door and becomes friends with Claire’s teenage son, the lonely teacher finds herself drawn into a brief affair with him. Claire immediately regrets the encounter and attempts to end their relationship, but Noah refuses to accept rejection. His attraction quickly turns into a dangerous obsession as he manipulates Claire’s family, threatens her reputation, and terrorises everyone she loves. Claire must fight to protect her son and escape Noah’s violent fixation.