Blac Chyna Conceals Baby Bump in Racy Fourth of July Swimsuit, Assures Fans She's Pregnant in the Photo

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Blac Chyna was feeling patriotic this Fourth of July.

The 28-year-old model rocked a cut-out American flag swimsuit as she lounged on a giant pool float on Monday, showing lots of cleavage and leg on Instagram.

WATCH: Blac Chyna Gives Pregnancy Weight Gain Update, Rob Kardashian Reveals He Felt Their Baby Move

"Hope everyone had a great 4th of July ❤," she captioned the snap.

"(I am preggo in this pic)," she added, referring to her small baby bump hidden under the stars and stripes of her patriotic swimwear.

Chyna's growing baby bump was much more noticeable in another pic she shared over the holiday weekend, in which her fiance, Rob Kardashian, cradled her bare belly.

"Happy 4th," she wrote.

NEWS: Blac Chyna's Dad Speaks Out for First Time -- 'I Always Knew She Was Gonna End Up Somewhere'

On Sunday's Keeping Up With the Kardashians, 29-year-old Rob breaks the news to his older sisters -- Kim, Kourtney, and Khloe Kardashian -- that Chyna is pregnant with his baby.

"This, like, was my decision. It really wasn't hers," Rob clarifies as his sisters appear stunned into silence. "I'm excited, yes, but I know you guys probably feel really weird."

"I mean, I don't expect you guys to be all happy, but, I'm sure you guys will be eventually," he added.

Watch the tense moment below: