Incestuous marriages.
Section 28
SEC. 28. Incestuous marriages.—Marriages between the following are incestuous and void from their performance, whether the relationship between the parties be legitimate or illegitimate: (a) Between ascendants and descendants of any degree; (b) Between brothers and sisters, including stepmothers and stepsisters; (c) Between uncles and nieces and aunts and nephews by consanguinity up to the third civil degree. Marriages between the following shall also be considered void: (a) Between stepfathers and stepdaughters and stepmothers and stepsons; (b) Between the adopting father or mother and the adopted; between the latter and the surviving spouse of the former, and between the former and the surviving spouse of the latter; (c) Between the legitimate children of the adopter and the adopted; (d) Between those who have been condemned as authors, or as the author and accomplice, of the death of the spouse of either of them.