Mairead Philpott tells the court that as far as she was concerned her children were "in the three bedrooms".
She says she was "hysterical" at the time of the fire and does not remember getting into the ambulance or being at the hospital up until the point a doctor told her "the children had passed away".
Asked whether she was able to describe what it felt like to be told that five of her children had died, she replied: "It's like my insides had been ripped out".
More top news
The six-time Olympic gold medallist has been forced to pull out of the Jamaican National Championships after suffering a hamstring tear.
The character's death will send shockwaves through Weatherfield.
It reportedly threatened attacks on planes "flying from Heathrow to the US" across the July 4 US Independence Day holiday weekend.