Christina Haack and Tarek El Moussa's children appeared on "Flip or Flop" throughout their childhoods, returning to HGTV screens on "The Flip Off."

HGTV star Christina Haack 's bitter divorce from Josh Hall took center stage in the premiere episode of her new show, "The Flip Off," which saw the starlet candidly explaining what led to the breakdown of her marriage.

Christina Haack invited ex-husband Tarek El Moussa's mother to be a guest judge on their HGTV series 'The Flip Off'

Tarek El Moussa recalled being caught off guard when he found out his ex-wife, Christina Haack, and her second husband, Ant Anstead, were suddenly “besties” during an exclusive interview with PEOPLE a

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Fans met Tarek El Moussa when he was married to ex-wife Christina Haack during the premiere of HGTV’s Flip or Flop in 2013. Their marriage ended when they separated in 2016 and finalized their divorce two years later.

Christina Haack, Heather Rae El Moussa and Tarek El Moussa revealed they are on a group chat together while answering fan questions about 'The Flip Off' during an Instagram Live stream on Jan. 29. However,

El Moussa and Haack married in 2009 before finding fame on HGTV with their hit series Flip or Flop. The couple share two children, a daughter born in 2010 and a son born in 2015. They announced their separation in December 2016, before finalizing their divorce in 2018.

The duo were joined by Heather’s husband and Christina’s ex, Tarek El Moussa, in a new promo for their HGTV series ‘The Flip Off’

Christina Haack and Tarek El Moussa have been bringing celebrity relationship drama to HGTV since 2013 when they were still a bickering married couple on Flip or Flop, and the drama continues today. However,