Can I ask the E. R. to keep my aunt who I'm unable to care for?

My 68 yo aunt who has had trouble walking for a while has gotten much worse. She is basically bed ridden. She drinks too, which makes it worse. I can barely take care of myself, I can't effectively take care of her too. My mom, and I took her to the E. R. a couple of hours ago to get checked out. My mom told me that she's gonna say that she's gonna tell them to keep my aunt, and put her in a nursery home. I thought it sounded cruel, and massed up. Would they really do that?

Can I ask the E. R. to keep my aunt who I'm unable to care for?
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