Lifestyle Style Kim Zolciak-Biermann, 40, Rocks a Thong Bikini in a Sexy Sunset Shot: 'My Favorite Place' The mom of six showed off her sexy physique in an Instagram photo posted on late Monday By Joelle Goldstein Joelle Goldstein Twitter Joelle Goldstein is a TV Staff Editor for PEOPLE Digital. She has been with the brand for five years, beginning her time as a digital news writer, where she covered everything from entertainment news to crime stories and royal tours. Since then, she has worked as a writer-reporter on the Human Interest team and an associate editor on the TV team. In her current role, Joelle oversees all things TV and enjoys being able to say she has to watch The Kardashians, Dancing with the Stars and America's Got Talent for "work". Prior to joining PEOPLE, Joelle was employed at The Hollywood Reporter. She graduated from Ithaca College with a degree in Television-Radio (and an appearance in the NCAA Women's Volleyball Final Four!) People Editorial Guidelines Published on January 15, 2019 11:38 PM Share Tweet Pin Email The sun may be setting, but Kim Zolciak-Biermann is turning up the heat! Late Monday evening, the Don’t Be Tardy star posted a sexy photo to Instagram from one of her recent tropical vacations. In the shot, which was taken from behind, Zolciak-Biermann, 40, flaunts her toned booty in a thong bikini — seen ever-so-slightly from the shadowy lighting — and stares out at the sunset over the waters. Though the mom of six captioned the photo, “My favorite place 🌊” she did not say where the scenic shot was actually taken. Zolciak-Biermann is no stranger to bikini snaps. The reality star has shared numerous revealing photos on her social media, from her red hot poolside shoot (taken by her 5-year-old son Kane) to her sexy vacation getaway snapshots with her signature backside pose. 12 Important Bikini Lessons We Can Learn from Kim Zolciak-Biermann Her recent photo closely resembled another one from her 40th birthday celebration in May, which featured the reality star paddle boarding in the golden hour. “These last 48 hrs have been a dream!” the mother of six wrote on Instagram alongside the shadowy photo. “Party with family and friends and now the beach for a short getaway 😍 #ThisIs40Baby #YouAreWhatYouThink.” Kim Zolciak-Biermann Says She ‘Loves’ Husband Kroy Biermann’s Speedo in Sexy Bikini Snap On that vacation, Zolciak-Biermann provided fans with plenty of revealing photos, including a gallery of shots showing her modeling a white thong bikini taken by husband Kroy Biermann. But it’s not just her own bikini bod that Zolciak-Biermann enjoys showing off. The star has also loves to share snaps of her husband in his Speedo. In August she shared a series of snaps of him rinsing off in an outdoor shower wearing his one-piece writing, “Yes please! For the love of God!” At one point, the reality star even posted a censored NSFW one of Kroy, 33, in his Speedo on the beach. RELATED VIDEO: Kim Zolciak Biermann ‘Is Done’ on RHOA, Says Andy Cohen Most recently, the two packed only their skimpiest suits for a romantic getaway together and snapped a pic poolside. “Private beach 🏝 baby! My favorite place on earth,” Kim captioned the photo. “Love your speedo Hunni bunni!! 🔥🔥🔥🔥🔥🔥🔥🔥” The couple married in November 2011 and share four children together: twins Kaia and Kane, 5; Kash, 6; and Kroy Jagger, 7. Kroy adopted Kim’s daughters from a previous relationship in 2013: Brielle, 21, and Ariana, 17.