M., I know exactly how you feel. We all live in Austin at the most 20 minutes away from each other.
My MIL NEVER attended anything our daughter ever did with her school, her ballet, her art.. anything.. The moment her daughters children were born she attended all sorts of events, parties.. etc..
This was not because I did not keep them all informed. I sent emails, made copies of the school calendars.. made sure they knew about performances. Nothing.
For years I had felt that my husband was also kind of ignored by his parents. he never noticed and said it was all in my head.
Finally, once his sister had a HUGE/ Expensive wedding (even though his mother told us we should really not have a big wedding, it was just a big waste of money), and then once her child was born MIL was at almost everyone of his events.. My husband began to realize and recall the disparity..
He and his mother went together to counseling. She told the Therapist that "mothers are always closer to their daughters children."
The Therapist told her, "No, that is not true, it is your choice if you treat them as if the daughters children one is the favorite."
He then said most parents/grandparents cannot control how they may feel, but they can make a choice as to how they handle it.
And so my husband then realized that is was his mothers choice. He realized where we stood in the family.
It had always hurt mey feelings they way they treated my husband, but it broke my heart and infuriated me how they ignored and made excuses for not giving our daughter the emotional support they gave their daughters children.
Our daughter is an amazing student, she is an award winning , published artist, she was a National Merit Scholar, has been awarded all sorts of recognitions for her Volunteerism and was a great rower.. They saw none of this.
They still to this day have not visited our daughter up at college. Our daughter will be graduating with honors in the Spring and she told us she can already tell they are starting to make noises like they may not be able to make it. They have the money, they are retired, they are in good health, they love to travel.. Hmmm, what will they use an excuse???
My daughter told me " I am over it". "They are just odd people."
I think they are heartless.