Courtesy TLC
October 08, 2012 09:00 AM

She’s made many a cupcake alongside her sister on TV.

Now, Katherine Kallinis has a bun in the oven.

The DC Cupcakes star is expecting a child with husband Ben Berman, she tells PEOPLE.

The couple, whose wedding played out in an episode last year, are due to welcome their sweet addition in February.

No surprise here: Cupcakes will help Kallinis reveal the sex of her baby at a November shower thrown by sister (and co-founder of their bakery, Georgetown Cupcake) Sophie LaMontagne.

“Everyone will bite into the gender-reveal cupcakes and find either pink or blue buttercream in the middle,” Kallinis tells PEOPLE. “We will want everyone, including me, to find out together and be surprised at the same time.”

Until then, the mom-to-be’s plate is full between her TLC show, which returns to TV Oct. 9 (8 p.m. ET), and the siblings’s book, Sweet Celebrations, that’s set to arrive in stores the same day. In addition, a Los Angeles branch of their confectionary is due to open next month.

“If I can get through this fall being pregnant, I feel like I can get through anything,” she says. “I’m lucky our mom works with us, so I have a guaranteed babysitter at all times. There’s no doubt it’s going to be chaotic.”

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