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**embargoed until 8/29 8am pst Kim Kardashian

Brian Prahl / Splash News

Being pregnant again is not stopping Kim Kardashian from showing her bikini body. She's flaunting that baby bump!

During recent family vacation to St. Barts, the 34-year-old Keeping Up With the Kardashians star was seen sporting a string, skimpy, bronze-colored bikini as she strolled down the beach with mom Kris Jenner, 59, who wore a similar, black bikini, paired with a matching, sheer cover-up, and makeup artist Joyce Bonelli, who wore a light, patterned bikini.

Kim posted several Instagram selfies of herself in her swimsuit, showing insane cleavage, for Flashback Friday.

**embargoed until 8/29 8am pst Kris Jenner

Brian Prahl / Splash News

The group was joined on their Caribbean island vacation by Kim and 38-year-old husband Kanye West's daughter North West, 2, Kim's sisters Kendall Jenner, 19, Kylie Jenner, 18 (who brought along Tyga, 25), Khloe Kardashian, 31, and Kourtney Kardashian, 36, and her kids. She and 32-year-old estranged boyfriend Scott Disick are parents to sons Mason Disick, 5, and 8-month-old Reign Disick, and daughter Penelope Disick, 3.

Kim had also worn a bikini while pregnant with North.

**embargoed until 8/29 8am pst North West, Mason Disick, Kim Kardashian

Brian Prahl / Splash News

PHOTOS: Kim Kardashian and family wear bikinis in St. Barts

Kim's sisters also flaunted their swimsuit bodies during their vacay in St. Barts. And before the family trip, Kylie brought Kendall, Tyga and other pals to Mexico as part of her 18th birthday celebrations, during which she posted a photo of herself wearing a hot pink, high-waist one-piece Body Glove swimsuit that her mother wore in the '80s.

Kim, who is about six months pregnant with her and Kanye's second child, also showed her bare baby bump in a black crop top and pants on the beach, as seen in a previous photos from the family's beach getaway. She also posted a photo of North and Penelope dressed as mermaids and hanging out with a mermaid performer.

Many rumors about Kim's pregnancy have circulated since she revealed in May that she and Kanye were expecting their second child. There was even online speculation that she wasn't actually pregnant, citing perceived differences in her baby bump sizes. Kim debunked the rumors with a naked selfie.