Khloe Kardashian flaunts her side-boob as Kim shows off her bump in matching black dresses in St. Barts

As the most recent Kardashian vacation got into full swing, Kim and Khloe put their curves on display in slinky black maxi dresses. The ladies stepped out for an evening stroll in St. Barts with sisters Kourtney and Kendall on Monday, soaking up the scenery of the Caribbean island while showcasing their stylish ensembles.  Favouring clingy attire despite her very much expanding waistline, Kim, 34, showed off her bump in a chic plunging number which revealed her pregnant silhouette in all its glory.

Kim is around six-months into her pregnancy and is expecting a boy with her husband Kanye West, 38.

Khloe, meanwhile, opted for some serious side-boob in a tank-style dress with low-cut sides.

The 31-year-old reality star donned large aviators and large gold hoop earrings while a racy thigh-high split in her frock flashed a little more flesh.

She appeared to be completely absorbed in her cell phone as she walked with her siblings, perhaps texting new beau James Harden.

The blonde bombshell and the 25-year-old NBA star have been enjoying lots of one-on-one time together in recent weeks.