The toddler was found sleeping in the house and was unharmed.
Investigations are continuing into the circumstances of their deaths and according to The Daily Telegraph, neighbours said the couple had separated, with the woman and young girl moving out earlier this year.
“She has been gone for months,” one neighbour said. “She took the daughter with her, so I was surprised to see her car there today.
“It’s so sad, she is such a smart little girl. They didn’t harm her, thank God.
“We would always say hello to them, they were nice enough.