Article continues below advertisementTarek El Moussa stepped in for his ex-wife, Christina Haack, when she needed a friend amid her messy split from Josh Hall.The blonde babe, 42, and Hall, 44, were initially slated to compete against Tarek, 44, and his second wife, Heather Rae El Moussa, on the HGTV show, The Flip Off, which saw the couples contend in a house-flipping showdown. Production captured tense moments between Josh and Christina, leading to their breakup just weeks into filming.