That Mary was saved from committing a sin does not indicate she committed one.
I recently was saved from killing myself and my family by a street light. I did not break any traffic rules.
Mary was not saved from committing a sin. Mary committed many sins, as all humans do, and as God’s word plainly says.
If it were possible for a human to live a sinless life, there would have been no reason for our Lord to have suffered and die on the cross. (”there is none righteous, no not one”)