The 35-year-old mum of two and her 70-year-old Texan billionaire husband Jim Clark are part-owners of mammoth state-of-the-art super-maxi boat, Comanche, which made its race debut this year.
The American boat was in the lead on the first night but was pipped at the post by Wild Oats XI on Sunday afternoon, much to the couple's dismay, and Kristy consoled her husband Sunday night.
But, being the competitive firecracker she is, the former Sports Illustrated model couldn't resist a cheeky threat to the Wild Oats XI, who broke records with it being their eighth win and fastest time.
She teased them with a rematch, writing: 'Congratulations to Wild Oats XI on your record breaking win. I'll see if I can talk Jim into bringing back Team Conamche for '15.'
Earlier on in the day model and philanthropist Kristy, who has two daughters with her husband of five years, Dylan, three and four-month-old Harper, jokingly goaded the other contenders.
'it's never over till it's over,' she said, and 'my heart's in my throat'.
And on Sunday morning the model, whose nickname for the boat is 'fat bottomed girl', tweeted: 'Theme song for this morning's ride to Hobart - I like big butts!'
On Saturday she was also providing a running commentary, saying, 'glued to yacht tracker.. a battle is taking place for the lead between Wild Oats XI and Team Comanche.
'So wish I was onboard! FOMO'
The FOMO stands for 'fear of missing out', referencing the fact she had originally planned to be on board the new American supermaxi for the race but pulled out at the last minute.
She decided not to take part in a race due to a weather forecast of strong southerly winds of up to 30 knots for the first night.
'Kristy has decided to pass on this trip due to the weather forecast for the first part of the race combined with mothering duties, with a four-month-old and a three-year-old,' Comanche skipper Ken Read said on Thursday.
'Kristy is new to offshore sailing and has smartly decided that her first night at sea probably shouldn't be in 30 knots of wind and big waves.
'It seems like a smart choice to me, although her competitive nature didn't bring her to this decision easily.'
Accomplished yachtsman Read and Jim had assembled a top-notch crew, including Australia's male World Sailor of the Year James Spithill and renowned American navigator Stan Honey.
The Sydney to Hobart was the first major race for Comanche, which was launched two months ago.
Speaking to The Daily Telegraph, Kristy said she would decide closer to the race day whether she would be aboard or not, but she had her husband Jim's full approval either way.
Anything I can do, she can do better,' Jim, who is 36 years Kristy's senior, said, explaining he wouldn't be able to take part due to arthritis in his wrist and ankle.
Kristy said at the time she would take the weather and her children into consideration before deciding to join the team on Comanche, which was one of the favourites to win the race this year.
Speaking of the new boat and how it would run on the water the model said: 'It really is weather dependent whether it is going to be our race.
'Our boat in no wind is a big slow tub in the water. With lots of breeze, it will be hard to catch us.'
Kristy raced on Camanche earlier this month during the SOLAS Big Boat Challenge, on Sydney Harbour, coming second to Super-Maxi Wild Oats XI in their first ever race.
The model tweeted her congratulations saying: 'Well raced [Wild Oats XI] what a fun race [SOLAS Big Boat Challenge].'
