Christina Anstead returned to work with her ex-husband, Tarek El Moussa, days after announcing her separation from estranged spouse Ant Anstead.In photos obtained by the Daily Mail, Christina, 37, and El Moussa, 39, were spotted together on the Los Angeles set of their long-running HGTV series, Flip or Flop, on Monday, September 21.Christina dressed casually in a pink T-shirt, dark blue jeans and black boots.