The Intruder (2019)

In San Francisco, the couple Scott and Annie are happily married. When Scott is promoted in his job, Annie asks him to move to Napa Valley to raise a family with children of their own. They negotiate and buy the old house that belongs to the structural engineer and widower Charlie Peck. But soon Scott notes that Charlie is always in his real estate and is hitting on Annie and he decides to investigate with his friend Mike who Charlie is.