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’

It’s not just their kids that keep Tarek El Moussa and Christina Haack together since the successful home-flippers ( Flip or Flop) went their separate ways and got remarried. The two are back for more real estate ventures on The Flip Off, a throwdown competition that airs Wednesdays on HGTV.

Christina Haack (formerly Christina Hall) and Heather Rae El Moussa (née Young) have a lot in common besides being beautiful blondes. Not only do they share the same passion for home renovation, but they also share a similar taste in men as Heather is married to Christina's first ex-husband,

"We all live together!" Tarek El Moussa joked after the moment, which occurred during an Instagram Live HGTV stars Christina Haack, Tarek El Moussa and Heather Rae El Moussa recently proved that they can laugh at themselves — and their unconventional professional situation.

Christina Haack (formerly Christina Hall) shared a shocking truth about her past relationship with ex-husband Tarek El Moussa, and revealed that his mother, Dominique El Moussa, told the HGTV star that she should reconsider marrying her son.

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,