S.C. Code Ann. § 63-3-530
(A) The family court has exclusive jurisdiction:
(18) to make an order for support of a husband or wife and children by his or her spouse, even though he or she may have left the home, in cases where the spouse's conduct or condition or his or her cruel or inhuman behavior made it unsafe or improper for the deserting spouse to continue to live with him or her.
Such orders may require either spouse or any other party to the proceeding:
(31) to require spouse to furnish support or to be liable for nonsupport, as provided above, if, at the time of the filing of the petition for supports:
(33) to order visitation for the grandparent of a minor child where either or both parents of the minor child is or are deceased, or are divorced, or are living separate and apart in different habitats, if the court finds that:
(3) that awarding grandparent visitation would not interfere with the parent-child relationship; and:
(b) the court finds by clear and convincing evidence that there are compelling circumstances to overcome the presumption that the parental decision is in the child's best interest.
The judge presiding over this matter may award attorney's fees and costs to the prevailing party.
For purposes of this item, "grandparent" means the natural or adoptive parent of any parent to a minor child;