Pai_Nosso:
The gospel clearly tells us that Mary and Joseph had sex after Jesus was born.
Where does it clearly STATE that? I haven’t read those words anywhere.
The word until does not always mean something happened after. Jesus said He would be with us until the end of time. Will He stop being with us after then end of time?
But lets assume that Mary remained a virgin and imagine the relationship. How frustrated would Joseph have been, he just got married, his wife had a child that wasn’t his and Mary won’t allow him to love her nor will she love him.
Is this a healthy relationship?
You are looking at it through the eyes of the world and our times, rather than the eyes of God…
There is some tradition that says that Joseph was also a consecrated virgin. There is also an approved apparition of St. Joseph where he appears with the Blessed Mother and he confirms his own purity and deep love for Jesus and Mary.
http://www.ncregister.com/blog/joseph-pronechen/st.-joseph-appeared-in-the-united-states
Is Mary submitting to her husband as the scripture says?
If her husband is being obedient to God and that is what God says for him and her to do, which apparently God did, then absolutely she is being submissive to him.