I am so sorry to hear about the entitlement your children believe they have to your DM’s estate.
My mum suddenly passed in 2024 and my children never expected anything, but my DM made provision for each of them to have a specific amount each, for which she saved until that figure was reached.
They were unaware of this but in the years before her passing, my DM had asked each grandchild if they wanted anything from her to remember her by.
My DS asked for her old trolly jack, which tickled my DM for months. and he was made up when he received it well before she passed. She just told him to take it and use it while she was still here to hear about what he did with it. Someone else chose one of her old gardening hats, and everyone else chose something unique that belonged to her from her house.
When Probate was completed, the grandchildren were astounded with what they received and did something to commemorate her, each in their own way, which made us so proud and knew we had brought them up correctly.
However, as my in-laws do not have much to leave, we have told them to what they have and enjoy their final years doing what they want together, while they are able.
My DC have said the same of me and my DH.
The point I’m trying to make is no one has the right to assume that upon death, they will be entitled to receive anything that the deceased had.
My parents didn’t have two pennies to rub together when they married in the late 1950’s. When their parent passed, they received nothing of monetary value.
My siblings and I expected the same of our parents, as we know how tough it was for them during the 1970’s and 80’s.
So, Highlightagogo, if you want your children to receive anything from your DM, you do what you feel is right. Give what you believe is reasonable - don’t listen to what they believe they should have. Or, keep it all yourself and tell them they may receive something when you die, as they’ve shown so little respect or thanks for what you have done for them up until now.