In South Carolina, a ex-spouse no longer has to pay periodic alimony if their former spouse remarries or the supported spouse continuously cohabitates with another. “Unless otherwise agreed to in writing by the parties, “continued cohabitation” means the supported spouse resides with another person in a romantic relationship for a period of ninety or more consecutive days. The court may determine that a continued cohabitation exists if there is evidence that the supported spouse resides with another person in a romantic relationship for periods of less than ninety days and the two periodically separate in order to circumvent the ninety-day requirement.”  See S.C. Ann. Code §20-3-130(B)