Just saw this movie about Nov 9, 2024, or so. It’s a modern movie. Man and wife living in a huge inherited house in England, probably. Woman’s best friend is having an affair with husband. Woman has been in a mental hospital in the past. The plot is the husband is trying to convince the woman she is having early onset dementia like her mother had. The house is undergoing renovations as there is a lot of plastic hanging all over. There is a female bobby police officer (black and white checkered headband around the hat) who comes to the house. Someone tries to run the woman off the road causing damage to the car. Woman gets home and calls the police. A male bobby arrives, and the husband tells the woman it is old damage caused by a delivery truck a week ago. The bobby leaves.  Police arrive. The woman explains to the audience she became aware of the plot because she found a hidden camera in the living room overhead light. The woman plotted with the female bobby to set up the husband. Woman layed on the couch within view of the camera and acted like she was cutting open her abdomen, lots of guts. The woman is a school teacher and there is a student that has a crush on her. The student comes to the house and sees the woman on the couch and calls police. Husband is summoned and he sees wife and panics. Turns out this whole stabbing thing was faked and student was in on it, I think. Best friend chases woman through the woods with a knive. Husband chases after them. They got her back in the house. At the end of the movie the best friend is trying to stab the woman. Husband gets in the way and he gets stabbed once in the stomach. Somehow the female bobby was waiting outside while this was going on waiting for it to unfold. The husband dies of the stabbing, the best friend is arrested and the woman is left alone at the house.