If ever a marriage has been tested, "
Khloe & Lamar" (Sun., 10 p.m. ET on E!) are experiencing it right now in theirs. After an abrupt move to Dallas, the couple is struggling with Lamar's depression and lack of performance on the court as he tries to acclimate himself to the Mavericks, and come to terms with what happened in Los Angeles.Then, to pile on, the couple have been trying to have a baby for the past two years to no avail. When ...