Happy End

In this trailer for the French film Happy End, a little girl walks into a room and tells a couple there that's she's ready. The woman asks if the girl would like to sit with them, but she says no. Later in the trailer, we see the little girl in a hospital bed, telling her father he's never loved anyone, including her and her mother. Later, a male voice asks the girl why she did it and she asks in a whisper, "What?"