Also, it is just extremely secondhand embarrassing my mom would behave like this at any age but in her 70’s and as a great grandma it’s ….well, it’s a choice.
Frankly, she is not a great example as a grandma. Yes, she may limit her antics and disrespect (most of the time) when with her grandchildren but that does not mean she is a great grandma. Ponder how you can ensure your children aren't fooled by her pretense.
My maternal grandfather remarried after grandma's death before I was born. Step-grandma seemed sweet but she was a different person to her husband and my parents. When I became an adult I was a religious volunteer for many years. To say I was poor would be an understatement. One time when I was bringing him to his home he gave me $5 - just the once - and he told me not to tell his wife. After he passed I remarked to my mother about his single gift to me years before. Mom replied that she was two-faced, "Her money was her money - she even had to pay taxes on her interest - and his money was their money." Imagine that he couldn't even share that he gave his grandson $5! That was not a great step-grandmother in my eyes.
Perhaps your husband can avoid some of their road ambushes by varying his route to and from work?



), and just want to be left alone. I don’t want to convince her friends and neighbors to not believe her (they’ll believe what they want) and mostly just wish it would stop. While also knowing I can wish what I want but it makes no difference.