Carey Hart Says He and Pink Don’t Know Sex of Second Child: ‘I’m Nervous for What It’s Going to Be!’

Pink and husband Carey Hart may be keeping the sex of baby number two a surprise, but Hart says he’s hoping for a boy on delivery day.

“We got one princess, so hopefully we’ll have a little guy coming,” the retired motorcycle racer, 41, told PEOPLE Saturday at the opening of his new Hart & Huntington Tattoo Shop in Nashville. “I don’t want any competition for my daughter.”

He adds, “I’m nervous for what it’s going to be.”

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The musician, 37, took to Instagram in November to announce that she’s expecting her second child with Hart, captioning the post “Surprise!”

Pink and her motocross husband are already parents to 5½-year-old daughter Willow Sage, whose sex was kept a surprise until delivery day as well.

“It’s been a while since we’ve had a baby around the house,” says Hart. “It’s going to be really fun.”

Soon-to-be big sister Willow is “over the moon” to welcome the new baby, as she’s been talking about having a sibling since she was 3 years old.

“She’s been talking about how she wants a baby sister,” says Hart. “She built a bicycle for him or her. So we’re going to finish it up after number two shows up.”

Hart shared the moment she decided to re-build the bike for her new sibling on his Instagram account, writing, “So proud of this lil’ girl today.”

Explains the proud dad, “She tore the bike all apart and after number two shows up, she’s going to decide the colors that she wants to do for it. I told her, ‘Look, he or she is not going to be able to use it for a while — but they’ll be ready for it.’ ”

Willow has been practicing other duties, like changing diapers, and Hart thinks she’ll be a great big sister — that is, “until they become competition, like all siblings.”

He says, “Right now, she’s very excited, until they start taking her toys and breaking her stuff, and then we’ll see how it goes.”

Though the pair still has a “couple months to go” until the baby arrives, Hart’s shop opening in Nashville will be the “last travel trip for a while.”

Hart’s Nashville shop joins his locations in Las Vegas; Orlando, Florida and Niagara Falls, New York, to give people a “really fun experience” while coming to get inked.

“Typically, it’s a really bad experience,” says Hart. “I remember when I first started getting heavily tattooed, you would show up to these places with really harsh lighting, really bad customer service — it wasn’t a great experience. So we wanted to be very first-timer friendly.”

As to whether Hart got a tattoo to commemorate the launch, he jokes, “Unfortunately, the only space I have left is my face and my head. I asked permission to get a tattoo on my face and wifey shot me down.”

And since Pink is now on the no-fly list due to her pregnancy, the couple expects to have a “really mellow holiday season” this year.

“This will be the first year that we get to stay home,” Hart says. “Typically, we’ll travel to see my wife’s family. It’s nice just to be able to stay home this year.”

He says the day will include a lot of relaxing and occasionally hanging out with friends.

“This is probably going to be the last calm Christmas for a while due to more kids and career and travel and all that stuff, so we’re just going to try to enjoy it and be nice and quiet.”

Whether the baby ends up being a boy or girl, Hart says, “I just want a healthy baby. That’s all I care about.”