“MAFS' ”Dr. Pia Holec Is Pregnant, Expecting First Baby with Fiancé Jason Goff: 'Our Greatest Adventure' (Exclusive)

The couple has been engaged since December 2021

Married at First Sight's Dr. Pia Holec is pregnant!

The reality show's psychologist and sex therapist, 39, and her sports broadcaster fiancé Jason Goff, 43, are expecting their first baby together, a rep for the couple exclusively shares with PEOPLE.

"Jason and I thrilled to announce our miracle baby to the world," Holec, who's four months along in her pregnancy, tells PEOPLE. "As a first-time mommy, this is a dream come true and a gift from my mom in Heaven. Our greatest adventure is up next!"

The couple, who has been engaged since December 2021, tell PEOPLE they're also looking forward to a sex reveal party planned for Saturday night.

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Related: MAFS: Dr. Pia Shuts Down Brennan When He Insists Wife Emily Needs His 'Help' to Speak Her Truth (Exclusive)

Sharing details of their upcoming celebration, Holec jokes, "Jason thought I was being extra to want a gender reveal, but then he decided that we should light the Willis Tower!"

As Chicago residents, Holec shares, "This Saturday night, at 8 p.m. CST, we, along with the rest of the city, will be able to look a the tower and find out pink or blue — if we’re having another little Jason or a little Pia."

Holec has been an expert on MAFS for the last three seasons and this past season in Denver was her first time working as a full-time expert on the show.

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Holec celebrated this milestone and the conclusion of filming her third season on Instagram, sharing a montage of photos and videos from throughout the season.

"The Denver season of Married at First sight is officially a wrap!" she wrote in her caption. "Though it was my third season with @mafslifetime, it was my first season as a full-time expert!"

She continued, "I’m very grateful for the opportunity and am so appreciative that everyone welcomed me with open arms. Love my MAFS family! 🫶🏽💗"

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