Your note helped a lot to understand the context better.

I really like the text and would love to provide actual help.

...(la acusaba / (la acusó) de .... y a veces de levantar su cabeza en una actitud de ostentación / jactancia / vanagloria y aterrorizarlo....

To cock one's crown would mean, to tilt it, in a sign of power.

I can't know what the author is truly trying to say, it's too short a paragraph, but he is evidently sure that Eve is to blame for Man's perdition. Now, whether she lured him --seduced him-- or forced him, that's his dilemma (I assume the writer is a man). Therefore, all she does --her sounds, her smiles, her tears, every little gesture-- as a display of shattering power.

Does this help at all?

a few links to support:
http://www.yourdictionary.com/ahd/c/c0443200.html
v. cocked, cock·ing, cocks
v. tr.
1. To set the hammer of (a firearm) in a position ready for firing.
2. To set (a device, such as a camera shutter) in a position ready for use.
3. To tilt or turn up or to one side, usually in a jaunty or alert manner: cocked an eyebrow in response to a silly question.
4. To raise in preparation to throw or hit: cocked the bat before swinging at the pitch.

And a more modern example:

All The Things I Promised... {Toulouse} (Street Dawgs)
He yelled, and stood up proudly to cock his crown at the canine's appearance, when Christian jumped before him and soon turned to his sad-smiling self. ...
http://s11.invisionfree.com/Street_Dawgs/ar/t329.htm