denise fedyszyn , from holmfirth , west yorkshire , tipped the scales at 20 stone 4 lb - and wore dress size 26 - when she was left feeling mortified while on a family day out with her daughters anya and isla .
it left the mother-of-two embarrassed , upset - and determined to do something about it , so she joined weightwaters , and changed her diet , as well as taking up exercise .