Mary Was Married and Not a Single Mother

The Bible teaches that Mary was not single. “Espoused” was equivalent to
“Mary thy wife” (Mt 1:18, 20). They simply had not yet come together. The
morality of Mary having another’s child seems to be that there was no
intercourse involved. God simply started the gestation process by
miraculous intervention. He provided the male part of Christ’s human genome
by His word.