Kristin Cavallari has her hands full with 15-month-old son Camden Jack and a new baby on the way. The tired mama revealed that she and husband Jay Cutler will be keeping the sex of baby number two a secret.

People reports that The Hills star doesn't know the sex of her baby yet. “Of course I want a little girl, but another boy would be a ton of fun too, so I really don’t care either way. There’s great things about both,” she said. Although the couple plans to find out for themselves the sex of their baby, they won't be revealing it to anyone else until the baby is born. “We’re going to find out, but we’re not going to tellanybody, so it will be a surprise for everybody else!”

Although Cavallari is busier this time around with Camden taking up a lot of her energy, she admitted that this pregnancy has gone fairly smoothly. “I’ve been really tired, but I’m very lucky because I haven’t had any morning sickness," she said.

Cavallari also told US Weekly that her husband, Chicago Bears quarterback, is really helpful with their son, which makes it easier for her as well. "He is always a great help," she said. He's been hands-on since day one and he's been really great with Camden. He gets on the floor and plays with him. He's a really great dad, it's really cute to watch."

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