The Co-naturality of Chrstian Suffering and Glory Concludes to the Blessed Virgin Mary's Intense Heavenly Glory co-natural to Her Intense Suffering.

The Blessed Virgin Mary encountered the most human suffering in human history. Her suffering began when she was told by Simeon of the suffering of Her Son, and continued until the resurrection of Her Son on Easter Sunday. Mary's suffering is summarised in Her seven sorrows as indicated below.

The Prophecy of Simeon. (Luke 2:34–35).  The escape and Flight into Egypt. (Matthew 2:13).  The Loss of the Child Jesus in the Temple of Jerusalem. (Luke 2:43–45).  The Meeting of Mary and Jesus on the Via Dolorosa.  The Crucifixion of Jesus on Mount Calvary. (John 19:25).  The Piercing of the Side of Jesus with a spear, and His Descent from the Cross. (Matthew 27:57–59). The Burial of Jesus by Joseph of Arimathea. (John 19:40–42).

According to St Paul in Romans, Christians suffer to be glorified -

Romans 8:17 And if children, then heirs (namely, heirs of God and also fellow heirs with Christ)– if indeed we suffer with him so we may also be glorified with him. 

As the greatest causes of glory are ordered to the greatest glory, the greatest causes of glory involve the greatest suffering. And the suffering of Christ as a cause of glory is closely associated with the greatest causes of glory, which is Mary as the mother of the Redeemer. Mary, as a very important cause of redemption and glory, thereby had very intense suffering throughout Her life, which is in turn ordered towards the highest glory. 

Furthermore, as the greatest suffering of a mother is to see a most loved Son die a horrible death, Mary experienced the greatest suffering. For Mary's love for Her divine Son was perfect, as from the fulness of grace Christ granted to his mother and the corresponding charity in Mary's soul. As Mary's love for Her Son was perfect, the perfect love between mother and divine Son causes a perfect union of wills between the two persons. The union of wills thereby causes Mary to experience Her Sons suffering in a uniquely intense way. Such suffering is thereby ordered to a uniquely intense glory for Mary.

Conclusion - Mary's suffering was uniquely intense due to Her role as mother of the redeemer and Her perfect love of Her divine Son. Mary's uniquely intense glory in heaven is in proportion to Her suffering.