[Petrosius]

But it is with her consent. This is highlighted even more when it is contrasted against the reaction of Zechariah. God does not need to ask because He knows what the response will be. It was precisely because Mary would give her fiat that she was chosen. God gives commands but He does not compel obedience. Compare Adam to Abraham.

[fwdude]

Mary's consent never entered into it:

...thou shalt conceive in thy womb, and bring forth a son...

Not conditioned by, "if that's OK with you."

And lest Catholic apologist try to accuse me of condoning rape, keep in mind that many of God's chosen vessels were unwilling, even intractable, regarding his will for them:
- Moses
- Jonah
- Simon Peter
- Thomas

And yet he still insisted on His way.

Mary's response was one of subservience to the will of God; it was incidental to His will.