Young mother spends her first healthy Christmas with children as double-lung transplant gives her a second chance at life

'I think of my donor all the time,' says grateful young mother whose double lung transplant has given her a second chance at life Mother of two Natalie Kerr, 31, spent Christmas 2011 hooked up to an oxygen machineFormer nurse was diagnosed with pulmonary hypertension four years agoPotentially fatal condition means blood and oxygen can't get to the lungs But her life was saved thanks to a double lung transplant By Emily Payne PUBLISHED: 15:43 GMT, 2 January 2013 | UPDATED: 15:43 GMT, 2 January 2013 Just over a year ago, Natalie Kerr thought her two young children would be spending this Christmas without her.