Is that you doing your "private interpretation" thing with proclamations of the RCC? They say not only did Mary not have the stain of original sin, she had NO sin at all, yet here you are "clarifying" that she had no serious sins. Do you mean "mortal" sins? Do you think Mary committed venial sins? For a church that supposedly can NEVER err, they sure do have trouble with deciding what is the current "truth" and catechizing their flock.
I don't know...a venial sin is pretty minor....did Jesus commit a venial sin when He angrily threw the money changers out of the temple???...Did He commit a sin of any kind when He did not honor His mother and father and stayed behind in Jerusalem???...Luckily I'm not the judge!!