I sometimes phone my DDIL before DS . Because when I phone him re arrangements etc. he invariably says I'll check with DW"'.
I can't see the point in going round in circles.
DDIL quite often sends me pics and messages from 6 month old DGS.
Always "Hi Grandma, this is what I'm doing today". Can we meet up on such and such a day.
DS will often randomly turn up with DCS for a couple of hours. Sometimes DDIL comes as well, sometimes not. (She loves the chance to go shopping.)
We all work full time, so time spent with each other is precious.
I guess all families need to work out the best way of communication without any family member feeling resentful .
OP, are you the only other female in the family? MIL just might enjoy chatting to another female in the family.
I love your analogy re you being just as uncommunicative as Mil's DS.
When my DS was about 12, I asked him to get me a Phillips head screwdriver. He came back with the wrong one.
His response was to ask me why I had automatically asked him to get it and expected him to know which one it was. He was 100% correct.
It didn't even occur to me to ask DD to get said screwdriver.