The docs gave me some advice about my Mum when her health and cognitive processes started to go haywire - don’t forbid anything, don’t insist on anything except her pills. Let her drive the process of coming back to life, after a major shock to her system. I suspect your Mum is having a serious self-re-assessment from old healthy person who is essentially OK, to old not-so-healthy person who needs help. This is major major shift. Takes time.