Christine Quinn could sell a lot more than real estate these days -- the "Selling Sunset" star might wanna bottle her post-birth workout regimen, 'cause she hit the beach to show off some tremendous results.
The real estate agent -- who's featured on the Netflix reality series -- was on the beach in Taormina, Sicily ... cruising the shore with her newborn son, Christian, in hand -- who's just about 3 months old at this point.
Check out the photos ... Christine was cradling her baby boy in her arms, and even got into the water with him -- holding Christian and an umbrella pretty seamlessly.
Cute mom and son moment, no doubt, but the other takeaway is how good Christine's looking. She had to have an emergency C-section during delivery in May. Three months later, as they say ... baby and mom are doing fine. Really fine!!!
Christine hasn't been shy about showing off her fitness during her Italian getaway.
The whole fam's out there -- including her hubby, Christian Sr. -- and it seems they're having a ball. Baby Christian probably won't remember this, but his folks sure will. Enjoy!