Old saying, once a man twice a child. She needs care like a child does. Two children, could you and would you take care of the two ends of the spectrum?
Totally second this above. ^^ As well, not only equivalent to 24 hour supervision/ care but you would be managing/ caring for a person who expects they do not really 'require' the supervision & care you provide, as she would expect that she will be treated as a non-impacted adult. It is also progressive. It is also very challenging & physically demanding- think of your baby potentially weighing her weight, & truly believing she doesn't 'really' require assistance (as she puts on a parka in july. or shorts in winter & goes to head out the door with no coat, and tells you "you don't know what you're talking about" if you approach it logically. Think of using the stove. Most people have to disconnect power or take the fuse out. Even microwaves can be too much.)
and here she gets a chance to have her granddaughter live with her with new life and she just dismisses it because "a baby would be annoying."
It's my experience seniors, & seniors with dementia, do not think that way. For one thing, they can't stand noise or running around or changes in routine. Cap it at 20 minutes, max. Nor loud music (unless they can't hear), nor sound after eg 9 pm.
There are also over 50 types of dementia, not including Alzheimer's disease, which may also involve 'wandering' (away). Or Lewey-Body dementia, wherein she may start seeing animals or people. Even without Alzheimer's disease, or LB, you can realistically expect a loss in recognition of family members, increased risk of falls (especially if independent), incontinence issues, reversed sleep schedules, poor emotional regulation, meltdowns, expectation of 100% of your attention, inappropriate behaviour, verbal or physical, decreased ability to cooperate, pain focus (possibly relates to the noise intolerance), & memory difficulties. Often paranoia & anxiety, as their things start 'disappearing' (ie they can't remember where they put them). The person then usually blames whoever lives there, & will also draw elaborate (often fanciful) conclusions to explain to themselves what is happening. Also, it's very typical to mistake family members for others, & respond accordingly (eg child is previous spouse, grandaughter is dtr, etc). Hygiene issues & or skin brekdown/ infections can be huge. Not to mention med issues/ side effects. She would also likely let her emotions 'fly', with you, knowing you are 'family'.especially.
Similar to pregnancy & childcare, there is little romanticized about elder care.
Something will work out
@Casey_03 . Hang in there. :hug: