Madlyn Ballatori and Christopher CaldwellColby Kissinger have the ultimate reason to celebrate.

The couple, who appeared on the first season of The Ultimatum: Marry or Move On in 2022, announced Madlyn is pregnant with their third child—a baby boy—in a social media post Sept. 24. Alongside a photo carousel which included snaps of Madlyn cradling her growing bump, she wrote, “Baby Kissinger #3 is on HIS way!”

The 28-year-old—who shares daughter Josephine, 2, and son Conrad, 12 months, with Colby, 29—noted that the new arrival won’t be the only addition to their extended family in the coming months. “Between mine and Colby’s families (ourselves included) there will be 5 new babies between Feb-April 2025,” she added. “Such a sweet season of growth and life! God is good.”

On the Netflix dating series, the pair were one of six couples contemplating marriage as one partner gave the other an ultimatum to either tie the knot or part ways. While Colby explored connections with other women and Madlyn caught feelings for Randall Griffin, they decided to stay together in the end, exchanging vows during the finale.

And they wasted no time expanding their family, telling E! News in 2022 they found out they were expecting just three months after filming wrapped.

“The show ended in May and I got pregnant in August,” Madlyn said at the time. “We're having a baby, we're taking on life together. We couldn't be happier.”

Josie was born that May, and just 16 months later, the reality stars announced Conrad’s arrival in September 2023.

“Welcome to the world,” Madlyn wrote on Instagram. “Ours is even brighter now because of you.”

Colby also celebrated the birth of his second child with a post of his own. “We welcome you my SON,” he wrote alongside a slideshow of family photos. “The KISSINGER name continues to live through you! We feel so BLESSED to see you healthy and to be able to share what this life has to give!”

For the latest breaking news updates, click here to download the E! News App