Source: Peta Murgatroyd/Instagram
November 17, 2016 04:34 PM

Peta Murgatroyd gave her baby boy a little TLC — and fans a lot to see — on Instagram, Thursday.

The Dancing with the Stars pro posed in just a bra and thong in a sexy new maternity selfie, showing off her glistening baby bump at 33 weeks. Murgatroyd’s hair was slicked back and she appeared to be wearing no makeup.

“Oiling this buttercup up,” wrote Murgatroyd, 30.

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Murgatroyd — who is currently in her third trimester — and fiancé Maksim Chmerkovskiy are getting closer and closer to becoming parents. Their baby boy is due in January.

RELATED VIDEO: Story Behind the Story: It’s a Boy for Peta Murgatroyd and Maksim Chmerkovskiy

“I hope I am 1/10th of what my father is,” Chmerkovskiy told PEOPLE. “If that’s the case, then this kid will be the luckiest on the planet.”

Murgatroyd separately told PEOPLE of their new addition: “My parents have wanted me to be pregnant for so long and Maks has been wanting a baby for a long time. I can’t wait to be a mom!”

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