fiancée Hayley Willis' baby boy, but the former Biggest Loser star has made a personal confession about getting accustomed to her new body.WATCH BELOW: Fiona Falkiner breaks down about weight gainTaking to Instagram on Sunday, Fiona shared a photo of herself three weeks after giving birth to son Hunter as well as one from when she was in the third trimester of her pregnancy."3 weeks postpartum vs 31 weeks pregnant," she captioned the post."Two almost identical photos...