i am yet to know why mary was refered to as Virgin even after many years of been married.
1)does it mean that mary was single when the pregnancy came?
2)who then was the angel ministering to "that your wife will concive by the power of holy spirit and his name shall be called emmanuel?
3)or were they not expecting to have babies when they got married. I.e no sex at all after marriage?

1)Yes she was single planning to marry Joseph when she conceived Jesus.
2)The angel ministered to Mary.
3)They planned to do everything couples do including having children.

Those who refer to her as Virgin Mary are ignorant.She did not die a virgin.