Well, Jesus is God sooooooo

Mary was sinless.
Read this by Fr. William Saunders, expert at EWTN
*We firmly believe that from the first moment of her conception Mary was free of all sin, including Original Sin, by a special favor of almighty God. The Archangel Gabriel recognized her as “full of grace,” “blessed among women” and “one with the Lord.” Mary had been chosen to be the Mother of our savior. By the power of the Holy Spirit, she conceived our Lord Jesus Christ, and through her, true God became also man, “The Word became flesh and dwelt among us.”
During her lifetime, although the Gospel citations are limited, Mary always presented our Lord to others: to Elizabeth and her son, John the Baptist, who leapt for joy in the womb at the presence of the Lord still in his own mother’s womb; to the simple shepherds as well as the wise Magi; and to the people at Cana, when our Lord acquiesced to His mother’s wish and performed the first miracle.
Moreover, Mary stood at the foot of the cross with her Son, supporting Him and sharing in His suffering through her love as only a mother could do. Finally, she was with the Apostles at Pentecost, when the Holy Spirit descended and the Church was born. Therefore, each of us can step back and see Mary as the faithful servant of God who shared intimately in the birth, life, death and resurrection of our Lord.
For these reasons we believe that the promises our Lord has given to each of us of sharing eternal life, including a resurrection of the body, were fulfilled in Mary. Since Mary was free of Original Sin and its effects (one of which is corruption of the body at death), since she shared intimately in the life of the Lord and in His passion, death and resurrection, and since she was present at Pentecost, this model disciple appropriately shared in the bodily resurrection and glorification of the Lord at the end of her life. (Note that the solemn definition does not specify whether Mary physically died before being assumed or just was assumed; it simply states, “Mary, having completed the course of her earthly life…”)*