Hey Sammycat,
Good for you, it shows real courage and determination to do something like write in christmas cards when it is so deeply painful for you.
I have written a christmas letter each year since our sons were born, but haven't started this years letter yet. I just don't know how to start it and how much I want to say about Greg's cancer.
Most of the people I send it to will know about the diagnosis, but some we haven't heard from since we told them. I feel like cutting them from the list this year. There are some people who we only communicate with at christmas and I'm not sure whether I should do something separate or what. It's all too hard.
I hope that you and your grandfather can find a special way of remembering and honouring your Mum at christmas. Perhaps you can start a new 'tradition' with him. Whatever you do, be extra kind to yourselves, it is going to be so different and difficult this first time without her.
My thoughts are with you.
Jill.