Christina El Moussa, her first husband Tarek El Moussa and his new wife Heather Rae El Moussa have been on very friendly terms since starring together in HGTV's 'The Flip Off.' PEOPLE confirmed in Jan

Christina Haack and Tarek El Moussa split close to 10 years ago—but the mother of three still knows how to get under her ex-husband's skin. She displayed that skill in the latest episode of their HGTV show " The Flip Off " when she teased a "new partner" who she knew would spark some upset.

Tarek El Moussa confessed to a cringe-worthy slip-up! In a behind-the-scenes clip shared on social media for an upcoming episode of The Flip Off, the 43-year-old real estate mogul revealed that he once accidentally called his wife,

Tarek makes the admission after one of his contractors, Bryan, calls Heather by Christina's name. "What did you call her?" Tarek jokingly prods the contractor. "One more time. Say