Had no marital relations
Until she had borne
He named him
καὶ οὐκ ἐγίνωσκεν αὐτὴν ἕως οὗ ἔτεκεν υἱόν· καὶ ἐκάλεσεν τὸ ὄνομα αὐτοῦ Ἰησοῦν
Joseph did not have sex or martial relations with Mary until after the birth of his son. The Greek text has the euphemistic term, he did not know her (οὐκ ἐγίνωσκεν αὐτὴν). This of course brings up the question of Mary’s virginity. Clearly, the text indicates that nothing sexual happened prior to the birth or coming forth of her son (οὗ ἔτεκεν υἱόν). Thus, Jesus was clearly born of the virgin Mary. The real questions concerned the word ἕως that means “until the birth of the son”. In the Gospel of Luke, chapter 2, the child was called the firstborn child (τὸν πρωτότοκον). The tradition of the Christian community, since the second century, has been that Mary was always a virgin. There is nothing here in this text of Matthew to preclude that. Joseph called the child by the name of Jesus (ἐκάλεσεν τὸ ὄνομα αὐτοῦ Ἰησοῦν), just as the angel had asked him to do.