This is an old post but i MUST comment!
Assertiveness Skills are in order!
Anyone working those hours is
1) trying to get rich and cash out and retire
2) has something wrong with their life
If your contract says 40 hrs, stick to it, and be productive. I just tried to "quit" for a guy i work for, and after our lunch her gave me a raise, and less work!
Remember, you teach others how to treat you.
If she works that many hours, and won't bend, move on. Thats nuts.
Unless i have a share in the company, i would just walk!
My boss is a certified workaholic. She gets into the office every day at 8:30AM and usually doesn't leave before 11:00PM. I also start at 8:30AM, usually end up working thru lunch, and I feel guilty when I leave at 7:30PM...