By Jenny Brown Pictures: David Hahn Swimming champ Susie Maroney wins her Olympic-sized battle of the bulge... Waves of joy wash over Susie Maroney's face as she tickles her baby daughter Paris and gets a big, gummy giggle in response. Susie, 34, feels wonderful and looks just as great, having shed 31kg since the birth of her tiny daughter on June 19. After years of heartache, the marathon swimming great has plunged into single motherhood with all the dedication she once devoted to her sport. Getting fit and strong for Paris was her number one priority, and she did it in just four months. "It took real willpower, but I had a goal," smiles Susie, showing off her sleek 56kg shape. "Now I've got Paris, I had to get myself in a positive place to look after her properly. If you're tired, overweight and eating bad food, it's a lot harder to cope." Sunny, determined Susie has been faced with so many heartaches — the tragic death of her twin brother Sean in 2002, the loss of two unborn babies, and her split from banker husband Rob Daniels only weeks before Paris was born. For the full story, see this week's Woman's Day (on sale December 1).