Mandatory Assisted Living? Need advice

My boyfriend's coworker has a 90 year old aunt who has been living independently and fairly well by herself for some time. A few weeks ago, she fell and hurt herself, and the doc ended up telling her that she would be required to live in an assisted living facility. I don't know the details, but she was upset about that and still not feeling physically better a few days later, so her nephew took her to another doc who noticed a massive bruise all up and down her spine from her fall. (The initial doc had not examined her or noticed this.)
Now, like I said, I don't know the specifics, but this coworker is quite distressed, saying that the assisted living facility is going to cost $10,000/month, isn't covered by medicare, and says that his aunt still wants to stay in her own home. She has been on morphine for something else (I don't know what), so I'm wondering if the morphine dose or med may have put her at risk for falls? does she need to still be on that med or would another be more appropriate (less risk for falls)? when was her last assessment? would a walker not be an effective aid?
My question essentially is this....Isn't she entitled to a second opinion about her ability to live on her own still? The understanding is that she manages quite well for the most part, and the doc who has required assisted living is the same one who didn't assess her properly or notice her bruises anyways. How can he say she must go to assisted living without examining other aids or potential problems? My boyfriend (and his coworker) are under the assumption that it is a state mandated requirement that she go to assisted living. Any advice or suggestions on how this can be contested or reassessed at all? She lives in Texas, and that's all I know. Thanks for your help!!!