Credit: Twitter

If you're impressed with how slim former Real Housewives of Atlanta star Kim Zolciak is after giving birth to twins last week, you're not the only one.

Kim and husband Kroy Biermann welcomed twins Kane and Kaia on November 25, and Kim's daughter Brielle can't believe what size her mom is now.

"How is my mom a size 4," Brielle ponders on Twitter on December 3. "It's been nine days since she gave birth to twins."

Way to go, Kim! Brielle recently posted a selfie Kim had taken, which is seen above. And we love how proud Brielle is of her mom.

Meanwhile, Kim responded to Brielle's tweet by revealing her weight-loss secret. "From chasing after you ☺️," Kim quipped.

To get a glimpse of video footage of Kim's post-baby bod, watch the video above, which was taken four days after Kim gave birth as she and Kroy took the twins to the pediatrician.

But it certainly sounds like the people close to Kim aren't exactly making it easy for her to avoid temptation. This week, Kim tweeted, "Why did @BrielleZolciak make the best chocolate chip cookies EVER tonight! AND my BFF Jen Brought me some earlier today." We're jealous!

Are you as shocked as we are about how Kim looks now?

Source: TwitterE! News on YouTube