It was just the motivation she needed to go on a strict diet – and shed 10st 12 lbs in just 17 months.
Jessica, 23, from Whitley Bay, North Tyneside, is now a healthy 10st 8lbs. And best of all, she now has the energy to enjoy playing with her kids, Lily, three, and Bonnie, two.
"I lost my mother to cancer when I was 12 and couldn't bear the idea of my own girls being without a mum," said Jessica.
Jessica piled on the pounds because she used to gorge on chocolate and crisps, had chips for lunch and two double cheeseburgers and chicken nuggets for tea.
As a result, she suffered hip pain and got breathless after a few steps.
Now she sticks to salmon, chicken and veg - and plans to marry her boyfriend Dan Raine, 25.
"It's like I've got my life back," she said.
You can see what Jessica looks like here.