Kristin Cavallari, 37, poses in a green bikini in Mexico... amid claims she has ... trends now Kristin Cavallari showed off her very defined abs in a green bikini a new social media post on Tuesday. The 37-year-old reality TV was promoting her summer 2024 collection for her brand Uncommon James. The mother of three - who talked about her late brother this year - was at a coastal resort in Mexico as she worked on her tan. 'JUST DROPPED: Oasis Collection ☀️New jewelry that will transport you to a beach vacation @wapedregal,' wrote the former reality TV star in her caption. This comes after UsWeekly claimed that friends think she and her new boyfriend, 24-year-old Mark Estes, have a 'genuine connection.' Kristin Cavallari showed off her very defined abs in a green bikini a new social media post on Tuesday The 37-year-old reality TV was promoting her summer 2024 collection for her brand Uncommon James The site talked to someone near her 'inner circle.' 'After seeing them together, they realize Kristin and Mark have a genuine connection, and they see how happy he makes her,' a source said. Earlier this year the couple made their romance Instagram official when Cavallari shared a photo of them vacationing in Los Cabos, Mexico together. However, the pair have reportedly been seeing each other for a while and met through social media. A source also told People in an article published late last month, after the couple had made their romance public, that Cavallari and Estes were getting 'serious' and 'really happy'. 'They've been dating longer than people think and have kept it very private,' the insider revealed. 'They met on social media.' The source added: 'They're serious enough now that they were ready to go public. They're really happy together. He's been so great to her and is just a really nice guy.' The mother of three - who talked about her late brother this year - was at a coastal resort in Mexico as she worked on her tan 'JUST DROPPED: Oasis Collection ☀️New jewelry that will transport you to a beach vacation @wapedregal,' wrote the former reality TV star in her caption She held on to a green smoothie while sitting near a bar at the resort In this image she looked down at her tanned and toned legs Then the screen flashed to her anklet The Hills vet was previously married to former NFL quarterback Jay Cutler for nearly a year from 2013 to 2022. Cavallari and her ex-husband share three children — sons Camden, 11, Jaxon, nine, and daughter Saylor, eight. She clearly changed her mind after she said last year that she was 'done' with the Nashville dating scene. This comes after UsWeekly claims that friends think she and her new boyfriend, 24-year-old Mark Estes, have a 'genuine connection' They looked flirty on social media while in Mexico 'I've decided I'm done dating in Nashville,' she told Entertainment Tonight in September 2023 before she started dating her current boyfriend, who is based in both Montana and Tennessee. At the time, Cavallari also said she could 'guarantee' that her next lover could be anyone but a country music star. 'I would consider myself to be a monk at this point,' she said. 'You can throw anything at me, and I'm like, "OK."' She was previously married to former NFL quarterback Jay Cutler for nearly a year from 2013 to 2022. Cavallari and her ex-husband share three children — sons Camden, 11, Jaxon, nine, and daughter Saylor, eight; seen in October 2019 And last year, she also said that her priorities would be taking care of her kids and 'having fun'. 'I've had a lot of fun in the last few years, just really focusing on my friends and getting to hang out with my friends again, because I didn't get to do that for a long time,' she told E! News in June 2023. 'Really, when you're having little babies and three babies, essentially, at one point in time, that was my world. 'And so it's been nice to just have fun again.' All rights reserved for this news site (dailymail) and under his responsibility