Assuming she said "no" would her Immaculate Conception be revoked?
If God could have created Mary without sin by applying the blood of Christ in advance so that she was sinless and remained so throughout her life, why didn’t He just do that with the rest of humanity and spare us all this sin and suffering?
It’d be so much easier to just make everyone perfect from the beginning and not deal with the mess that sin brings.
Assuming she said "no" would her Immaculate Conception be revoked?
That is a useless rhetorical "what if" game that begs a suspension of disbelief to play. One would have to accept, even for the sake of argument, that God did not already know what was in Mary's heart or what her answer would be.
Why don't you give us your protestant definition of "obey" and tell us how it differs and is more applicable than the Catholic definition from the Catechism;
144 - To obey (from the Latin ob-audire, to "hear or listen to") in faith is to submit freely to the word that has been heard, because its truth is guaranteed by God, who is Truth itself. Abraham is the model of such obedience offered us by Sacred Scripture. The Virgin Mary is its most perfect embodiment.
I’m not catholic... and no I do not believe Mary “gave her consent”...rather she yielded her will to Gods. She said...”Be it unto me as YOU will”...that is not consent..of yes or no..