I think some posters are forgetting that there are 7 days in a week and, as the child goes to nursery for 1 day and the OP for 1 day, that leaves 5 days in which the DiL must be looking after the child herself...unless her husband does everything every weekend, childcare, washing, cooking, cleaning etc. I imagine that hygiene would have to be high on the list of priorities with a child in the home, especially having to go to the toilet upwards of 10 and possibly 20 times a day and thoroughly washing your hands afterwards before touching the child. Who minds the child when mum goes to the shops then needs the toilet. She could hardly fit a buggy in a cubicle and who'd want to do that anyway?
I doubt anyone with UC would be foolhardy enough to not see a doctor. Some good advice here about childcare and that's really the only thing that the OP has any say in.
I hope things can get sorted to everyone's satisfaction.
I'm sooo glad not to have the problems and illnesses I read about on here as about 80% seem to have something going on. A shame, when retirement could be a time to sit back and enjoy life.