Hello Geoff have you ever opened a can of worms, just pretty much all of us, honestly all of us have struggled with some of all of what you describe.
I had a shower, we had a shower, I get dressed, we got dressed, I'm going shopping we went.
It was like having a shadow, whatever I did we did, there is no one solution just about coping.
I did for her what I know she'd have done for me.
Copying behaviour I get part dressed then help her, we shower together, I go shopping/we get shopping, inclusion not instruction.
Might not work for everyone but it worked for me for something over 10 years wife and mum two times loser. K