Mairead Philpott tells prosecutor Richard Latham QC that it is "possible" her husband Mick got out of bed to light the fire.
She agrees with him that there was no mention of this in her defence case statement.
Mr Latham asks why she would say nothing of this in her interview if she was innocent. Mairead says she was following advice.
More top news
A few showers are expected across the west of Scotland tomorrow but elsewhere high pressure remains in control.
Footage posted to YouTube shows the moving moment a nine-week-old boy hears his mother speak to him for the first time.
The tribute song features in the latest installment of the film franchise, and climbed 21 places to claim the top spot this week.