When enders game came out there was a big issue about the author of the books bring very homophobic because of his religion. I made a donation for the same price as the tickets to a pro LGBTQ+ org and still went. If your MIL gets snarky just put the donation under her name and put her email in. I would do that the next day so there is no fight and it messes up the kids time.
Mother-in-Law bought family tickets to Medieval Times for tonight, but they're on strike and scabs are doing the show...
She bought the tickets without knowing about the strike. We accepted the gift without knowing about the strike....