Jessica Simpson: I think I'm having a girl

"I don't think she can hold that secret to herself," Eric Johnson said about finding out his and Jessica Simpson's baby's gender.

STORY HIGHLIGHTS

• "I think it's a girl," Jessica Simpson, 31, told PEOPLE at a launch


• The couple plans to find out their baby's gender


• "I don't think we can wait," Eric Johnson says

() -- and fiancé Eric Johnson are pretty sure they know what to expect when they're -- if only they could agree.

"I think it's a girl," Simpson, 31, told PEOPLE at the New York launch of a clothing line that she and sister created. "But I don't know yet."

"I think it's a boy," says Johnson, who was on hand at Dylan's Candy Bar in New York along with future mother-in-law Tina Simpson. "We're pretty much at a standstill there."

But the couple plans to find out their baby's gender.

"I don't think we can wait," says the former NFL player, 32. "Jessica is too honest about everything, she needs to know. I don't think she can hold that secret to herself."

Even if she's wrong about the baby's gender, Simpson promises her child will be well dressed.

"If it's a boy," she quips, "I'll put him in tutus!"

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