A sicko mom who allegedly imprisoned her twin sons in a Bronx house of horrors was spotted for the first time — walking free after she was released on bail, exclusive photos show.

Lissette Soto Domenech, 64, refused to answer The Post’s questions about the horrific child abuse accusations when she buzzed into a Harlem apartment building Tuesday night.

Domenech wore a stocking hat and a scowl as she toted plastic grocery bags into the building after a Mazda dropped her off.

She stubbornly ignored repeated requests for comment, refusing even to glance toward a reporter.

Neighbors and law enforcement sources confirmed that photos from the run-in and elsewhere showed Domenech.

The mom is accused of confining her twin sons, now 14, in their Riverdale apartment for nine years — possibly in a twisted bid to keep the boys “babies forever.”

The two kids weighed barely more than 50 pounds each after she bottle-fed them a baby food diet and kept them in diapers, prosecutors and sources said.

Domenech posted a $25,000 cash bond after being arraigned last week on a 13-count indictment – including a child abuse charge — despite bankruptcy records last year showing she claimed to have $0 in her bank account and was $300,000 in debt.

The shocking alleged abuse came to light Oct. 15 after city Administration of Children’s Services workers – who received a number of anonymous tips and made several unsuccessful attempts to get into the home – finally got Domenech to open her Mosholu Avenue apartment’s door.

An appallingly skinny teen, who appeared to be 8 years old, could be seen through the doorway, prompting a frantic scramble to the hospital, sources have said.

The boys were hospitalized for three months before being released into foster care, according to the sources. 

One boy, who is autistic, apparently was never evaluated or received services, prosecutors said. 

The sixth-floor apartment had no age-appropriate food or items in sight, only infant cereal, baby bottles and toddler toys, the prosecutors said.

Building residents said they knew children lived in the apartment, but hadn’t seen them outside for years, if ever.

One neighbor who lived below Domenech said she used to hear the boys running and crying all night, trailed by their mother’s shouts. When she complained directly to Domenech, the mom allegedly reluctantly opened the door and revealed two disconcertingly young-looking kids.

“I thought they were babies. They looked very tiny and skinny, they were probably 8 years old at the time,” the downstairs neighbor said. “I thought they were younger.”

Other neighbors said Domenech made sure to keep them from getting a peek inside the home.

“She was like a little witch,” one said. “If you go near her door, she’d close it.”

Several neighbors said they contacted ACS to no avail.

Domenech pleaded not guilty and was next scheduled to appear in court Feb. 4.

A woman inside the Harlem apartment where Domenech has apparently been staying threatened to call the police on The Post.

“Oh my God. She don’t even live here,” the woman said behind a closed door. “I’m going to call the police right now. I’m calling right now.”