A reclusive Brooklyn mom stuffed her dead 1-month-old son in a duffel bag and stashed his tiny body in a closet — horrifying her unsuspecting neighbors, police and sources said.

Gynae Kendall, 25, was charged Sunday with concealment of a human corpse, one day after police said they found little Adonnys unresponsive inside the Flatbush apartment.

Cops made the grisly discovery after the baby’s maternal grandmother called the NYPD and asked them to conduct a wellness check late Saturday, telling police she was worried after not seeing the boy for some time, according to law enforcement sources.

Gynae Kendall, 25, was charged with concealment of a human corpse in the death of her 1-month-old son Adonnys Kendall, police said.  Gregory P. Mango for NY Post

Questioned by the officers at the scene, Kendall claimed the newborn was with his dad — but the 30-year-old father denied it — prompting a search of the apartment that led to the heartbreaking discovery around 7:30 p.m., the sources said. 

They said Adonnys, who was wrapped in a blanket and stuffed inside the bag, was pronounced dead by EMS at the scene.

There were no apparent signs of trauma, sources said.

Kendall refused to cooperate with police and demanded a lawyer before she was booked and charged, the sources said.

“It’s heartbreaking,” one 29-year-old tenant told The Post on Monday. “It’s heartbreaking that a newborn had to die. It makes us feel unsafe. I don’t want to live here anymore. 

“I don’t want to live in a building where people like this are let in and allowed to live here.”

Little Adonnys was stuffed into a duffel bag in the closet, sources said. Gregory P. Mango for NY Post

Shocked residents at the building at Veronica Place near Beverly Road said Kendall was a reclusive presence, refusing to make eye contact with neighbors on the few occasions she was spotted outside of her seventh-floor apartment. 

“She never spoke with anyone in the building,” said tenant Christopher Kinney, a personal care attendant. “You never heard yelling or screaming or anything like that coming out of her apartment.

“But she always sounded like she was cooking or laughing on the phone with a girlfriend and just playing music really loud,” Kinney added. “She was loud and noisy, usually pop music or rap music. You would hear it far away outside on the floor, you could hear it from this far away around the corner.”

Several tenants told The Post they were assured they were moving into a luxury building — only to find out that several of their neighbors were not well-to-do, but rather homeless and had gotten in through the city housing lottery. 

They also said Adonnys’ father was a “creepy” presence who would stalk tenants and engage them in uncomfortably probing conversations in the elevator and hallways. 

The child’s official cause of death will be determined by the city medical examiner’s office. Gregory P. Mango for NY Post

“He looked at me weird and then got in the elevator, and he said, ‘Hmm, you sexy. What are you into?’” a building resident who identified himself only as Jonathan V. recalled.

“Then he kept looking at me while we were riding the elevator,” Jonathan said. “Lo and behold, he started asking me more sexual questions, like, ‘Oh, what are you into?’”

One tenant said the dad started going through his belongings in the lobby when he was moving in, and another caught him outside his door on a Ring camera and posted the images around the building as a caution to his neighbors.

Adonnys’ dad has not been charged with wrongdoing.

The baby’s official cause of death will be determined by the Office of the Medical Examiner, authorities said.

Investigators are also waiting for the autopsy to determine whether the mom will face additional charges, the sources said.