In Their Skin

http://www.fandango.com/movie-trailer/intheirskin-trailer/156284 this movie is rated R and and their is a unhappy family looking for their new home but they meet a new family that kill people's and the unhappy family son got scared and later the wife is in the bathroom with a gun, the father is Screaming and he has blood on his chest, and the happy father is holding a shotgun to the family.