I am glad you had a good time last evening. I am sorry to read that your h's grandfather passed away. You may not hear a peep out of your h about his passing. There is no harm at all in messaging your condolences to his mother. I think it would be the right thing to do and a kind gesture on your part.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.