Brahma Hen Not Laying- HELP

I am have 10-11 month old brahma hen hatchen april 2011. She hasn't laid in about 2 weeks since about 2-12-12. It seemed at first she was going broody because she was sitting on the eggs in the nest box for about 4 days all the time. We also have a very large brahma rooster and she is his favorite. He tore all the feathers out of her neck, out of her shoulders of her wings and a little on her back. He even made her bleed one day on her shoulder. It seems like every chance he gets he mates with her. I only have 3 hens to 1 rooster and none of the other hens have this problem. I seperated and put her in a smaller coop during the day and put her back in with the rest during the night. She still has laid an egg though. She hasn't even sat on anything in 2 weeks and I don't know why. Please help me out. If you have any questions just ask. -Thanks