Look away, Heidi! Mike Gunner's 'new girlfriend' Casey Stewart flaunts her busty bikini body... after finding love with the Married At First Sight star By Daily Mail Australia Reporter Published: 23:16 GMT, 25 March 2019 | Updated: 23:16 GMT, 25 March 2019 Viewcomments He's currently in an on-screen relationship with Heidi Latcham on Married At First Sight. But away from the cameras, Mike Gunner is dating Casey Stewart - the eldest daughter of The World's Hottest Grandma, Gina Stewart. On Monday, Casey, 26, revealed one of the reasons why Mike, 44, has fallen so hard for her by stripping down to a burgundy skimpy bikini on Instagram. Does Mike like? Casey Stewart, who is dating Married At First Sight's Mike Gunner, flaunted her incredible bikini body on Instagram this week Showing that she's learned a thing or two from her model mother, the Gold Coast stunner struck a sexy pose and flaunted her busty assets in the two-piece. Mike and Casey's shock romance was revealed by Woman's Day on Monday. 'Mike and Casey have been spending a lot of time together and she stays at his place on the Gold Coast a lot,' a source said. Heidi won't be happy! Mike is currently in an on-screen relationship with Heidi Latcham on Married At First Sight 'They're planning to go public after the show, once Mike's commitments finish,' they divulged. Just like her famous mother, Casey is a glamour model, although she currently works in construction. The brunette isn't afraid to flaunt her sensational figure online, with her Instagram account featuring photos of her dressed in skimpy bikinis and busty ensembles. The World's Hottest DAUGHTER! Casey is the eldest daughter of The World's Hottest Grandma, Gina Stewart (right) A love of Married At First Sight grooms seems to run in the Stewart family, with Gina being linked to Dino Hiro earlier this month. The 48-year-old addressed the romance rumours at the time, telling Daily Mail Australia that 'any girl would be lucky' to date a man like Dino, 35. 'Dino is a lovely guy,' said the stunning mother-of-four, adding that she considers to the mediation coach a 'good friend.' Like mother, like daughter! A love of Married At First Sight grooms seems to run in the Stewart family, with Gina being linked to Dino Hiro (pictured) earlier this month 'I have a lot of respect for him and how he managed himself on Married At First Sight,' she continued. 'He's a good friend and is all about kindness, compassion, forgiveness and love. Any girl would be lucky to be with such a man.' Gina was crowned The World's Hottest Grandma last year after her sexy modelling photos went viral, propelling her to global fame. Simply sensational: Gina was crowned The World's Hottest Grandma last year after her sexy modelling photos went viral, propelling her to global fame Share or comment on this article: All rights reserved for this news site dailymail and under his responsibility