And voila! This reality-TV mom even had some challenges when it came to working out. She told Us Weekly, "I had C-sections with Liam and Stella, too, but after I recovered, I could do sit-ups and lunges. This time, I can't for at least a year, so I've relied on healthy food and cardio." Considering she slimmed down so quickly just doing cardio is mighty impressive if you ask us!