Smith, 43, was found guilty of murder Tuesday in Mold Crown Court for starting a fire in a baby carriage while drunk. The blaze killed five people, ages 23, 20, 4, 2 and 15 months, in the apartment above hers, the British tabloid The Sun reported Wednesday.
Although Smith told the court she would never harm a child, her daughter Charlotte, 23, offered a different story, saying her mother pouring boiling water and extinguishing cigarettes on her when she was a child.
"She's evil. We hope she dies in jail," Charlotte said, a reference to herself and her sister Lisa, 24, and brother Jonathon, 22.
"We could have ended up like those babies she killed. This woman's a monster," Jonathon added.
Smith will be sentenced next week, The Sun said.