OMG re MRSA! So prevalent and so many potential problems. Glad they are keeping her in hosp - hope they get MRSA under control quickly.
Lifting is the biggest cause for hernia. NoThing! heaver than a gallon of milk .. about 7 pounds. If she is stubborn about picking up and carrying laundry, groceries, grandchildren, or anything else, she'll wind up back in the same situation.
Of course she is depressed. She has been through so much already, she is just plain tired. It's hard/impossible to be cherry when your world keeps getting turned upside down and you are in pain. Consider anti-depressant meds and possibly post-op counselling, somewhere she can honestly express how she feels without 'dumping' on supportive family.
Keep up your research ... she is indeed fortunate to have a proactive daughter as an advocate!