Kourtney Kardashian wowed in a yellow swimsuit while relaxing poolside with her family in Miami on July 20. Joined by longtime love Scott Disick and their two kids Mason and Penelope, Kardashian lounged in the sun before taking a refreshing dip in the pool at the Setai Hotel.

The 34-year-old looks amazing after giving birth to her daughter a year ago. And breastfeeding could be a weight loss trick -- in photos taken by FameFlynet, Kardashian was seen feeding Penelope while braving the heat yesterday.

"It was harder to lose weight the second time around. I gained 45 pounds with Penelope," Kardashian told Us Weekly about her post-baby body. "This time, the focus is really on being a mom and being present, knowing my priorities."