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Kourtney Kardashian is finally ditching those flowy caftans for a more form-fitting look!

The oldest Kardashian sister has been hiding her post-baby bod since giving birth to daughter Penelope back in July -- but yesterday in Miami she was ready to show it off ... and show some PDA to baby-daddy Scott Disick.

The two were seen in Florida, where they're currently filming the 3rd season of "Kourtney & Kim Take Miami." And while we don't usually see too much lovey-dovey behavior from them while out in public, they made quite the cute pair.

And though Penelope wasn't quite ready to brave the Sunshine State's sun, little Mason enjoyed some time at the beach with his dad -- who went shirtless for photogs.

Check out more photos of the family fun day in the gallery above!