Olympic windsurfer who dumped 'amazing wife' after she sacrificed her medal dream to look after the kids is now dating her Team GB replacement Nick Dempsey split from wife Sarah Ayton after the London games last year She won Beijing gold but gave up her 2012 place to look after their children Now Dempsey has been seen with her Team GB replacement Hannah Mills An Olympic love-rat dumped his loyal wife who had given up her chance of competing in last year's games to look after their children, and has started dating her replacement on the British team. After winning a silver medal in the Windsurfing at last year's Olympics, Nick Dempsey, thanked his 'amazing wife' Sarah Ayton who had 'sacrificed a medal' so he could win his. But four months later it emerged that Dempsey, 32, had left the family's £425,000 detached home in Weymouth, Dorset. Nick Dempsey with his 'amazing' wife Sarah Ayton and there two children after winning a silver medal in the 2012 Olympic windsurfing Linked: Dempsey has been seen at bars and restaurants with Miss Ayton's replacement on the Olympic sailing team, 25-year-old Hannah Mills Now he has been seen in restaurants and bars with Ms Ayton's Team GB replacement, 25-year-old Hannah Mills, the Sun reported. Ms Mills won a 2012 silver medal in the 470 class, the same category that Miss Ayton would have competed in. Dempsey attended the British Olympic Ball, held at the Grosvenor House Hotel in Mayfair, without his wife and arrived on the red carpet with Welsh-born Ms Mills and fellow Olympian Saskia Clark. Miss Ayton, one of the "three blondes in a boat" who won sailing gold in the Yngling class at the 2008 Beijing Olympics. She is still looking after their sons, a three-year-old and a nine-month-old. Before their split last year the couple announced they had to make a "big call" for their family as to whether one or both of them competed at Rio 2016. Split: British Olympians Sarah Ayton and Nick Dempsey, who have two children, separated last year Sarah Ayton shows off the gold medal she won in the Yngling class at the Beijing games where Dempsey took bronze. She gave up her place on the 2012 team to look after their two children Crest of a wave: Nick Dempsey in action at the Summer Olympics Miss Ayton, also 32, publicly hinted at a comeback and said "there is a bit of a desire burning again." But asked about the prospect of them both competing, Dempsey said: "There is potential for that, but there is also the potential for a lot of problems with that - we do have two kids, and to do that would require a lot of funding and a lot of sacrifices to be made." Asked if he was prepared to look after the children like his wife had done, he laughed: "I'm not sure I would. She is a better parent than me. She is far better at looking after the kids than I am. I don't really fancy being a full-time dad. According to a friend, Dempsey became a regular on the party scene after his success this summer in the RS:X class. The crowd at the Weymouth venue cheered with delight as he jumped into the harbour and swam over to his waiting family after crossing the finishing line. At the time, Miss Ayton proudly tweeted: "Enjoying a pimms [sic] watching my man win his silver medal." Pure gold: Sarah Ayton displays the Gold Medal she won in the Yngling class as she hugs her then fiance Nick Dempsey at the Beijing Olympics in 2008 Wedding Day: Sarah Ayton and Nick Dempsey wed in Fleet Church near Weymouth, Dorset in October 2008 The couple met in 1998 at a youth sailing championship and were engaged three years later. They married in 2008. Miss Ayton, who also took gold at Athens in 2004, was on track to become the first British woman to win three consecutive Olympic golds before abandoning her training schedule last year to focus on motherhood and "supporting Nick," who was desperate to improve on the bronze he secured in Athens. At the time Dempsey said: "She basically let me go and fully concentrate on trying to win and she looked after everything else in life. She has been absolutely amazing. I couldn't have done it without her. There is no doubt in my mind she would have won here. She sacrificed a medal. Dempsey and Hannah Mills have so far declined to comment.