An angel told Joseph in a dream to not fear to take Mary AS HIS WIFE.
That comes with understood repsonsibilities and privileges, one of which is sex. I have no doubt that when God had the angel give Joseph that message, that HE knew how Joseph would interpret it.
And Scripture tells us that Joseph did not know her (aka have sex) until AFTER she gave birth.
Since Mary did not have physical union with the Holy Spirit, there was no one flesh union that happened therefore the charge that a conjugal union happened is not valid.
If the charge is to be made that she is the spouse of the Holy Spirit and that a conjugal relationship was established, you’re forced into the position of claiming that physical sex was involved.
The words "Hot Springs tonight!" had long been washed off of the donkey's side by the time they Holy Couple arrived at the stable...