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.
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In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".