Hello, the movie was pretty modern i think, post 2000-2005, might be wrong but i´m pretty sure, color, english….i think 🙁 , movie not show.

It was about a family who were killing people in the basement or cellar or a room in that house and they were usually smiling, can´t remember if it was just a modern ritualistic killing or they were eating them but i think they were eating them. Wife, husband a son and a daughter but the daughter didn´t know about this cause she was too small i think but soon finds out and i think at one point her boyfriend comes and she wants to save him  and at one point a cop comes they kill him too and i think at the end swat team descend in their house.

Please help, thank you!