I don't care any more

I have been gone for several days because of my work situation. I have been going in at 6:00 AM and working to 5:00 PM with no lunches. That is the easy part. The hard part to me is that I have to drive almost an hour and a half to get there. I lose 3 hours per day on the road. As difficult as it has been lately, I found myself in a very challenging situation today. I have six employee's who work for me. They have also been having a stressful time even to the point that the best of the group had to take a couple of days off in order to get himself together. 3 months ago I brought this girl in through a temp agency because I had a bad experience with the previous employee that I hired. She is not making a lot of money, but her 90 days ends on Monday. I am certain that she is expecting a raise. I talked with my boss today who is the president of our division and he told me that we would hire her, but at the same rate that she is making now. She will now have really good benefits, which she has not had, however her pay rate is going to stay the same until she goes through 90 days probation actually working for the company. Even though I disagree, I am going to have to break the news that she is not getting a raise but yet still expect her to work just as hard as she has been. Are the benefits worth not getting a raise? Is the company doing her wrong in this situation? How would you respond if it were you? Do I care too much to be a good manager?