Courtesy Kim Zolciak
Sheila Cosgrove Baylis
September 16, 2013 01:35 PM

Whoa, Momma!

Kim Zolciak shared a picture of her double-baby bump via Instagram on Saturday.

The mom-to-be appeared pool-ready, sporting a black strapless bikini with white lace trim.

“Going swimming with the kiddos,” she wrote in the caption. “This pool makes me feel so much lighter! This belly #twins #excited #blessed #nofilter.”

The Don’t Be Tardy star, 35, announced in August that she is expecting twins.

“I was completely shocked,” she said at the time. “I had no idea. It was a natural conception, but twins do run in the family, so I guess I shouldn’t have been surprised.”

Zolciak is married to Kroy Biermann, a defensive end for the Atlanta Falcons. The couple have two children together, sons Kroy Jr., 2, and Kash Kade, 13 months. Zolciak also has daughters Ariana, 9, and Brielle, 16.

PHOTOS: Stars Show Off Their Bikini Bumps!

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