Since my Dad passed away in 2020 (from Covid), I have come to realise that everything my Mum did was for my Dad. Even when he was living in a care home, she worked in the house and the garden that he loved so much, but since then she has done less and less around the house and garden. She is 86 now and has some mobility problems, so she can't do as much as she used to; however I think that a lot of it because she no longer has the motivation. I hate to see her untidy house because she doesn't throw anything away and the untidy garden because she can't do it herself and the gardener rarely comes round. I could help her, but I don't want to offend her. How should I approach this?