Candiace Dillard and her hubby to be Chris are having a major pre-marital issue ahead of their nuptials on the latest episode of “The Real Housewives of Potomac.” Candiace said the couple had a big fight after Chris called her something “unforgivable” while they were at a Congressional Black Caucus dinner with the rest of the cast. But Candiace didn’t take the insults lying down, and lobbed a few low blows of her own.