In the grand scheme of things (since God not only forgives our sins, but forgets them) in the end, none of us will have ever been tainted by the stain of sin. Righteousness was imputed to Mary (by faith) and it was imputed to us in the same manner. When the believer stands before God, through the imputed righteousness of Christ we will stand there "just as if I'd NEVER sinned".
Justification by faith. The imputed righteousness of Christ. God's gift to Mary. God's gift to all who believe on his Son.
There is that.
Thankfully!!!