In Their Skin (2012) on Netflix

Plot summary

Mark Hughes, a lawyer, and his wife Mary, a real estate developer, bring their eight-year-old son Brendon to their cottage to recover from the death of their six-year-old daughter, Tess, in an accident. The family, with their dog Harris, settles in. On a night walk they notice a vehicle that seems to be watching them. The next morning Jane, Bobby and Jared Sakowski arrive with firewood, introduce themselves as neighbors and invite the Hughes to lunch. The visit turns unsettling: the Sakowskis question the couple endlessly about their lives, admire their house and overstay. When Jared pulls a knife on Brendon in his room and the adults argue, the Hughes send the Sakowskis away, and Mark's temper shows.