Hello yourself.
Mary's relationship with God need only have been established at some point prior to her conception.
Yes. But God knew Mary when she was first created, so then would have been a good time.
Furthermore, as Christians, we all house the third Person of the Trinity, the Holy Spirit.
Yes. Or rather, yes! We gain this through our baptism, which wipes away our Original Sin. There was no sacramental baptism when Mary was born, so she had to be "wiped clean" in some other way.
God can take what is unworthy ... and make it worthy.
Again, yes! Exactly our point. God can do this for us, He could do it for Mary.
We correct you guys so often (with scripture) on this fallacy and I didn't want you to think you beat us down, or finally convinced us of this perversion of scripture by us not mentioning it...
So I thought I'd mention it, again...