Spoiler - did anyone else ...
... get the disturbing feeling that, when she was bashing the doll's head on the cot, hubby was gonna come home and we'd find out it was actually the baby she was bashing (demons being masters of deception and all that ...) ?
Not knowing anything about the film, I thought that was a possibility, however given the stereotyped and "safe" ending that came about 5 minutes later, it clearly wasn't going to happen.