The only thing that will strengthen marriage are young men and women trained in virtue and dedicating their marriage to God.
Two homos or two lesbos cannot pretend enough to accomplish those requirements.
...but her argument baldly states that the relationship between the man and women is peripheral to the situation, and that the union primarily is for the benefit of the offspring...we can argue all day whether homosexuals make good parents-I tend to think they’re problematic-but her point that heterosexual infidelity (or any infidelity) has a deleterious effect on children is beyond a doubt...on that basis, her argument has standing...
Marriage was instituted by God for man and woman to be open to begetting children and to be friends in God.
Whether a couple acts in fidelity to one another does not alter the original intent of marriage according to God.
The original intent by God's design is what is at stake.