Francesca will always remember the "heart-breaking" moment she realised her nine-months pregnant sister was wearing clothes in a smaller size than her.
She had been concerned about her size for some time, and was even diagnosed with swelling on her brain - thought to be linked to her weight.
Despite being called the "chubby" twin once at school, the 34-year-old from Sale only started to put weight on when she joined a fast-paced graduate scheme in 2012.
