A 57-year-old woman was fatally shot in the face in front of her family when she tried to defend her husband and son from a pair of violent robbers in their lower Manhattan condo building Monday night.

Home health aide Ying Zhu Liu was found dead inside the eighth-floor hallway of the Two Bridges building located at 44 Market St. just after 11 p.m., police said.

“It’s all surreal,” Liu’s grieving 32-year-old son, Lin Rong Yan, told The Post on Tuesday. “I feel only sadness right now.”

Two suspects in black ski masks allegedly followed the victim’s husband, 61, into the building and into the elevator, where they attempted to rob him.

Yan buzzed his dad into the building and was waiting for him in the eighth-floor hallway when the elevator opened on the struggle, sources told The Post.

The son tried to intervene and was pistol-whipped by one of the suspects, the sources said.

Liu heard the commotion and came out with a stick to confront the perpetrators, and was shot in the face in front of both her husband and son.

The husband and son were both unharmed.

The robbers managed to grab Liu’s husband’s cell phone before they fled in an unknown direction.

The pair were still at large as of early Tuesday.

“In the past 10-something years, no such crimes happened in this building,” a family friend told The Post. “But this is America.

“They immigrated here 10-something years ago,” he said. “We know each other from work. He doesn’t have much relatives here. He called me this morning. I thought it was just a normal robbery. I didn’t expect [it was] that serious.”

The gunman was described as wearing a half-red, half-black hooded jacket, black pants with a white stripe down the leg, and white sneakers, police said.

The second suspect was wearing a black hooded coat, black pants, and black and white sneakers.

Liu’s son did not recognize either of the suspects, he told The Post Tuesday morning.

The eighth-floor hallway where the shooting took place was still smeared with blood 12 hours after the incident.

A pillow completely soaked with blood was propped on one wall, and there was a blood-stained handprint on the wall, as well.

A pool of blood concentrated on the floor near the door to the stairs.

The 12-story building where Liu was killed has 16 condo units featuring balconies and views of the Manhattan Bridge.

The building also houses a preschool and commercial space on the ground level.

A two-bedroom, two-bathroom unit with three balconies currently for sale is asking for $1.38 million, according to online listings.

The investigation is ongoing.

Additional reporting by Desehania Andrews