Like the previous poster said, check out hystersisters, they've heard it all over there and can give you all the first hand info you'd ever want.
Typical recovery is 6 to 8 weeks for an abdominal procedure for a woman around 40. If her lymph nodes went with it and the fact that she had cancer, i'd give her 10 weeks. Lymph nodes help a great deal in healing and of course fighting infection.
Also, even though she went through menopause before the procedure, ovaries still continue to put out low levels of hormones in most women well into their seventies and eighties - she may be going through second, but less severe menopause (technically a hormone withdrawl).
I'm not quite forty yet and at four weeks I started walking the dog regularly but was not allowed to have sex, pick up anything heavier than 10 pounds or even contemplate going back to work. My brain was a little foggy at times, I still had pain and of course my body was recovering from the emotional trauma of losing an organ.
Please try to be understanding. You shouldn't even think of calling her spoiled until her doctor releases her for normal activities (probably at 6 or 8 weeks.).
As for what she can do? I was doing the dishes at 2 weeks. I sorted the laundry at 2 and actually did the loads (if someone carried them for me) at 4. I made my own meals, except for dinner because I was usually tired in the evening. I was able to drive at 2 weeks but really didn't like it until about 4. Started grocery shopping for myself at 6 (but didn't carry my own bags ... Still don't at 9 weeks). You might want to accompany her to the next doctor's appt. (typically at 6 weeks) and be in the room with the doctor to talk about what she can and can't do.
You're wonderful to take good care of her. So many women have to go through this on their own. I know I didn't say thank you enough, so consider this my thank you for her.
Take care.