Kim Zolciak is loving her growing baby bump.

The Real Housewives of Atlanta star shared a bikini picture featuring her pregnant belly. In the Instagram pic, she wore a revealing black strapless bikini with white lace trim.

"Going swimming with the kiddos! The pool makes me feel so much lighter! This belly ... #twins #excited #blessed#nofilter," Zolciak captioned the photo.

Kim, 35, confirmed last month that she and husband, 28-year-old Atlanta Falcons defensive end Kroy Biermann were expecting twins.

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The couple, who wed in November 2011, have two children together, Kroy Jr., 2, and Kash, 1. Additionally, Kroy legally adopted Kim’s daughters from her previous relationships, 12-year-old Ariana and 16-year-old Brielle.

An insider told Us Weekly that "Kim loves being pregnant" and that she's hoping for another daughter.

"She really wants a little girl," the insider added. "Brielle and Ariana are older now, and Kroy wants a girl of his own."

Watch a scene of the season finale of Dont Be Tardy where Zolciak learns she is pregnant below.