The HGTV star let his true thoughts be known about ex-wife Christina Haack's estranged husband, who was set to appear with them—as well as Tarek's current wife, Heather Rae El Moussa—on the upcoming show The Flip Off.
In a video shared by Tarek, 43, and Heather, 37, to Instagram Dec. 17, the duo discussed the potential for a season two of the show.
Christina, 41, was quick to jump into the video's comments, joking, "Only if @theheatherraeelmoussa is my partner next time. Tarek you can have Josh."
But Tarek had his own shade to throw at Josh, sharing the video along with Christina's comment to his Instagram Stories and writing, "Even with Josh slowing me down, I can still beat the girls."
Christina—who shares children Taylor, 14, and Brayden, 9 with Tarek, and son Hudson, 5, with ex-husband Ant Anstead—shared his response to her own story, adding, "Game on @therealtarekelmoussa."
And while The Flip Offhas had its fair share of change ups since Christina and Josh announced they would be divorcing in July after two years of marriage, Tarek and Heather—who are parents to son Tristan, 22 months—would still be on board for another season.
"I feel like it was fun," Heather said in the Instagram video. "I think it brought us all together in a different way."
HGTV
Noting that Christina and Tarek hadn't worked together in years, and that she and the Christina on the Coast alum had "never filmed together," it was overall a positive experience.
"I feel like it was fun," the Selling Sunset star added. "I think we would do it again."
"Josh and I officially split up," an emotional Christina told Tarek. "We had a blow up. Middle fingers in my face. Things with Josh have been bad for a long time."
Instagram/Christina Hall
The reality star then confessed that her children were part of her impetus to finally end her marriage.
"The kids literally asked me to leave," she explained. "They told me he's not nice to me. Why would I stick around?"
"When someone is insecure and doesn't like to watch you win, that really puts a damper on everything," she told Entertainment Tonight in November. "I feel like I was not shining as bright to try and not make him feel emasculated. But who wants to look like that?"
For a look back at the couple's relationship, keep reading.