What sins are gravely opposed to the sacrament of Matrimony?
1645-1648 Adultery and polygamy are opposed to the sacrament of matrimony because they contradict the equal dignity of man and woman and the unity and exclusivity of married love. Other sins include the deliberate refusal of ones procreative potential which deprives conjugal love of the gift of children and divorce which goes against the indissolubility of marriage.