I agree with hopeshell. This does not seem to be a very sensible way to approach a your wife's condition. Diagnosis and staging cannot be done without a biopsy and surgery.
Is there some reason why they are not doing something about the ovarian/uterine issues now?
That seems like a very unusual course of treatment for ovarian and uterine cancer. Is your wife considered in remission from her other cancer? If not, they may not feel she is up to having surgery to remove the ovarian cancer. How did they determine she had both ovarian and uterine cancer? The only way to diagnose ovarian cancer is to remove a mass and biopsy it. If she has visible tumors on a scan, then the tumors on the ovary could be cancer that has spread from another location in her abdomen (like her liver cancer). So, it wouldn't be considered ovarian cancer at that point. Therefore, the treatment would be different than for primary ovarian cancer. The fact that she has had liver cancer is worrisome that it has now spread to these other areas and they are not new primary tumors. But, your doctor is the best one to give you advice on her condition. I would get a second opinion if I were in your wife's shoes. But, if you feel like she has not told you the whole truth about her condition, then changing doctors won't be a good solution. But in general, giving birth control pills for her fibroids (which are usually a benign condition) would not be the proper way to treat either ovarian or uterine cancer. The hormones in the pills could feed the cancer if they are a gynecological cancer. Hopefully, you will find more answers and determine your next steps after talking with your wife. Good luck to you both!