[Mrs. Don-o]

Of course she was a recipient of God's grace. Her spirit rejoices in God "her Savior."

You ask: "So is everyone who has received grace automatically sinless?"

No. There are different kinds of grace, different kinds of gifts. In Mary's case, not for her own vainglory but strictly to prepare her for her role in God's plan, she was gifted with a sinless human nature, like that of Eve in Eden before sin came into the world. Thus she was able to transmit a perfect human nature to her Child, who is God Incarnate.

As I wrote to metmom, either Mary was, by Divine grace, preserved from sin, or Jesus was sinfully depraved in His humanity, the heir of her fallen flesh.

[MHGinTN]

“As I wrote to metmom, either Mary was, by Divine grace, preserved from sin, or Jesus was sinfully depraved in His humanity, the heir of her fallen flesh.” A very famous fallacy of the undistributed middle, often used by con artists who wish to manipulate people.