There's a family in our driveway

Rating: 7/10 (2 April 2019)

Plot Spoilers.
As a child Adelaide goes into a house of mirrors, sees herself and is traumatized. As an adult, she has a husband and two children. They are at their lake vacation home when "the purge" happens by their ugly clones who lived their lives in tunnels.
The plot didn't make a lot of sense to me either, by the scare effect was pretty decent. Also, there is a twist at the end, one that did have a minor clue.
Guide: F-word. No sex or nudity. Some blood.