u/Gazzerbatron

My 12 year old child is graduating from elementary school and has been at the same school since pre-k. I invited MIL in OCTOBER to my baby child's ceremony and MIL agreed to attend. FF to this week, MIL's favorite grandchild is having a kinder graduation ceremony the same day so now she can't attend my child's ceremony. ​​​she lives 1.5 hours drive away and suddenly doesn't feel like she can handle freeway driving. Cousin's kinder ceremony is at 10am and my child's ceremony is at 1:30. She could easily do both. How would you approach this? I want her to know that I am pissed. She came for my older child's elementary graduation. Don't come for my older child if you won't come for my baby.