(b) The prohibitions described in subsection (a) of this section are applicable to consanguineous relationships where persons are blood related by virtue of having a common ancestor.
(c) The prohibitions described in subsection (a) of this section are applicable to persons related by affinity, where the relationship is founded on a marriage, and the prohibition continues in force even though the marriage is terminated by death or divorce, unless the divorce was ordered for a cause which made the marriage, originally, unlawful or void.