Even Alfred Hitchcock would find this creepy.

A Brooklyn woman spent three years living in a cramped apartment with her dead mom — propping her up at the dinner table and sleeping next to her skeleton every night, The Post has learned.

Chava Stirn, 28, even dressed like her mother — wearing the same black outfit and shoes that 61-year-old Susie Rosenthal had on when she died.

“It’s a scene right out of ‘Psycho’ . . . This is one of the weirdest cases I’ve ever seen,” a law-enforcement source said.

Stirn set Rosenthal’s bones on a bed of trash bags in the kitchen of their Borough Park apartment, a law-enforcement source said.

For the slumber parties, she dragged a chair into the kitchen to snooze next to the corpse — leaving her twin bed covered in stacks of paper.

“She may have been living there with the mom’s remains for two or three years . . . It’s a horrible scene,” the source said.

Neighbors didn’t smell anything suspicious until the super of the building tried to investigate a leak coming from the apartment on Monday afternoon, police sources said.

Stirn refused to open her door, so emergency workers knocked it down — and found her in a chair, looking disheveled, surrounded by waist-high piles of trash, police sources said.

Stirn, who lived with her mom before her death, never left the home, neighbors said.

She refused to let anyone inside the apartment, so a relative would sometimes leave food outside her door, the police sources said.

Neighbors often heard strange noises coming from the apartment.

“When I listened, she was screaming . . . [She yelled] ‘I kill myself, I kill myself!’ ” said Malka Lerner, 41.

Another neigbor said, “I never saw her or her mother. They never came out. I never saw the door open.”

When cops approached Stirn, she was acting “erratically.” She was taken to Maimonides Medical Center for a psych evaluation.

She believed her mom had “left her there to die,” a police source said.

The cause of Rosenthal’s death is not yet clear.

A relative of Rosenthal declined to comment.

Additional reporting by Natasha Velez