Here's what to know about how "The Flip Off" handled Christina Haack and Josh Hall's breakup while they were filming the new HGTV show.

Christina Hall is opening up about what really led to her split from Josh Hall — and it turns out, her ex-husband Tarek El Moussa played a role. During the premiere of The Flip Off, her new HGTV series where she teams up with Tarek and his wife,

The 41-year-old TV personality shared a vulnerable moment with El Moussa, revealing just how challenging her third marriage had been behind the scenes. After telling her ex, “Josh and I officially split up,” Haack gave her side of the story in why her relationship with Hall didn’t work out — and it’s crushing.