Khloe Kardashian

Don't expect to see Khloe in a skimpy string bikini anytime soon. "I always wore a one-piece because I always felt more comfortable," she says. "I could sit on the beach and do whatever, and if someone took a picture, I wouldn’t feel self-conscious."

Celebrating mom Kourtney's 32nd in Punta Mita, Mexico, 17-month-old Mason "looked so happy to see his dad!" when Disick, 27, joined them on the beach, a source tells