God bless traditional Catholic marriage between a husband and wife. The Catholic teaching on marriage is that it is between one man and one woman.
According to the United States Conference of Catholic Bishops, “Marriage is an original gift from God to humanity. Although sin entered the world damaging the marital relationship, this gift was not lost but redeemed by Christ and raised to a sacrament (see Eph. 5:28-32; see also Mtt. 19:4-6). Sacred Scripture proclaims that God created humanity in “His image” as “male and female” (see Gen. 1:27). So unique is this relationship that the marital union makes of the husband and wife “one flesh” (Gen. 2:24). Procreation, Scripture teaches, is a gift from God (Gen. 1:28). When spouses conceive new life, they participate in the Lord God’s creative power. This is an awesome privilege and sacred responsibility!”