“Her words in Luke 1 should answer that question for you.”
If that were so there wouldn’t have been, since the 19th century, any division in the Mariology of The Church would there?
“Her humanity is like Christ’s - human in all things but sin”
True Goddess, True Woman, P? I don’t think you want to go there, my young friend! :)
Let’s look at it another way. Is Christ worthy of emulation because He didn’t sin? I am not asking if our created purpose is to become like God, btw.
Is Panagia worthy of emulation because she didn’t, by the exercise of her free will in responding to God, sin or was she “preserved” from it and thus couldn’t sin?
You know that's not what I meant! :-P
K., Catholic theology doesn't claim that the Blessed Mother was incapable of sin. It was indeed "an exercise of her free will in responding to God" and a perfect response to His grace. She was preserved from some of the effects of original sin (concupiscence), making that perfect response easier for her than it is for us. But it was still her response, and there was nothing "automatic" about it.
OTOH, Our Lord is ontologically incapable of sin, because He is God and God cannot be the subject of the verb "to sin", more-or-less by definition.