don't know what to say, Yorkie. Obviously everyone is still very sad and emotional. I'm guessing he passed away only a few years ago at the most. Good to see at least that his family loves him and wants to express that somehow by tending to his grave but they could also do that by showing kindness and warmth towards his widow and dd, couldn't they?
Can you pay for a service for him, if you're religious at all. Take dd to church and light a candle and take some nice flowers to decorate the alter?
Plant your bulbs at home in a corner of your garden where you put up a picture of Nigel and dd tends to it with her own little watering can?
Sorry you had to deal with this today, hun.