Kristin Cavallari is looking mighty fine just seven months after giving birth to her second son with husband Jay Cutler.

“Just got a nice little workout in. Yes those are baby monitors behind me,” the 27-year-old mother of two wrote on Instagram with a pic of her well-defined abs. “#GottaLoveNapTime”

In July, the former Laguna Beach star revealed to Access Hollywood that she’d already dropped 20 pounds, but was having trouble losing the last five.

She said at the time that it was a trifecta of watching what she eats, breastfeeding and “working out really hard.”

Jay Cutler’s wife gets back at people trolling her on Twitter after Bears win. #TBvsCHI http://t.co/IMsnwlXn02 pic.twitter.com/mbaisJXdji

— Sporting News (@sportingnews) November 23, 2014

“I don’t put any toxic chemicals in my body. I’m a freak about reading the ingredients. I don’t count calories, I just read what’s in whatever I’m going to be putting in my mouth,” she said. “I try to be as organic as possible I stay away from dairy for the most part… I’m actually allergic to cow’s milk so that’s reason enough but I also, I think that that’s the number one weight gainer. If you’re going to get one thing out of your diet, I think it should be dairy.”

Cavallari and husband Jay Cutler welcomed son Jaxon Wyatt on May 7, joining his two-year-old sibling, Camden Jack.