Hi. Christine,
I've had a few strange comments. One friend said " I'm glad it's you because of all our friends you are the strongest and can cope with it." This even though I'm a single mum with three boys under 9 and going through a divorce.
My sister was a blubbering mess. I was the one comforting and reassuring her!
I think people say silly things due to their own shock. They should not speak until they've had time to process the news.
I would give your mum the benefit of the doubt at this stage, as the other ladies have mentioned. It's certainly not easy when support is so needed.
Stay strong.
Have a lovely Christmas,
Love,
Mandy