Sheriff's Office – NBC 6 South Florida

A woman is charged with first-degree murder after she allegedly doused herself and her two sons in gasoline and then set them all on fire in Orlando, according to the Orlando County Sheriff's Office.

On August 26, 26-year-old Esther Thelus was allegedly caught on surveillance video at a 7-Eleven purchasing the materials she later used to attempt to kill her 2-year-old and young boys.

According to investigators, Thelus' roommate said she took the 2-year-old to his father's house so she could give him up and move to Fort Lauderdale.

However, the man and his mother requested a DNA test to confirm paternity, and after some time, the man's mother brought the boy back to Thelus.

Shortly afterward, she went to the 7-Eleven, authorities said.

In an interview with NBC affiliate WESH, store employee Marie Jean recounted the interaction with Thelus and described the discomfort she felt as Thelus attempted to put gasoline into an empty gallon of water.

Another customer even offered to help her by providing her with a real gas container, not realizing what a horror that would be.

“Am I making the right decision to do what I'm going to do?” I think that's what she's telling herself,” Jean said while watching the footage. “Once she left the store…I would say it wasn't even an hour before the officer came and spoke to me.”

Thelus then allegedly went to her home in the 7200 block of Hiawassee Oak Drive, just minutes away, and started the fire.

Her roommate came outside and asked why, WESH reported. Deputies said Thelus responded that it was due to “too much humiliation.”

The infant, who suffered burns to 80% of his body, died from his injuries almost two months later.

“The children didn’t ask to be born. I would rather you call DCF or go to the fire department, give up the children and say you can no longer care for them, rather than do something like that,” Jean said. “I feel bad, PTSD. This happened in my store.”

Thelus remains hospitalized and is charged with first-degree murder and attempted first-degree murder.