Under cross-examination, Mairead Philpott denies that she and her husband Mick concocted a story.
When asked what Mick Philpott meant when he allegedly whispered to her in a police van "we're sticking to the story," Mairead replies: "There was no story".
She says it was about not wanting to tell police about having had sex with co-defendant Paul Mosley shortly before the fire at her home.
More top news
Cuts and a lack of resources have put an already "overstretched" Metropolitan Police at risk of being "overwhelmed" by rape cases
The Met Police Commissioner admits change is required after a report highlighted failures in the service's conduct in rape investigations
Around 20 cars have been damaged after part of the roof of an Audi showroom collapsed.