The women were comparing their relationship to unwed or divorced parents. But, that's not a logical comparison.
Let's say the church daycare teaches children that their parents should be married and that marriage is between one man and one woman.
So then, the church is teaching children that their mothers and fathers should be together.
At the same time, the church is teaching that "two mothers" or "two fathers" should not be together.
So, the two situations are very different.
So then, the church is teaching children that their mothers and fathers should be together.
Leaving aside for the moment the question of whether the daycare has the right to deny entry to children of parents in a same-sex relationship. There is no question that they do, both as matter of faith and the law. In the case of parents who divorce, the mother and father are not together. Should the church deny entry to children of divorced parents? Or parents who were divorced and remarried?