According to Catholic belief...Mary did not carry the burden of Original Sin...the burden that the rest of humanity carries.
In Catholicism, she is considered to be the only pure human being ever.
But Mary herself claims that she needed a Savior (as every human being other than Christ does).
No. Catholicism teaches that Jesus Christ was a pure (i.e. sinless) human being, and that Mary's sinlessness was due to Christ.
-A8
"Mary did not carry the burden of Original Sin"
Original Sin, another false doctrine. The only consequences we suffer from what Adam did are that we are mortal and we lack the strength to live a sinless life ourselves. We are only guilty of the sins we ourselves do however, anything else denies the justice of God.
Because of Christ, all will be resurected, and all can be forgiven of sin on condition of repentance. All the consequences of Adam's fall will be undone leaving us before God to answer for our own actons.
As for Adam, he did have nearly 1000 years to repent himself, who is to say God didn't forgive him?