celebrate an event. My wife is the oldest so usually this is her responsibility. Her Sisters always contribute to pay for parents and cover their family. This brother never offers to contribute or cover his family's dinner. Even when the sisters in front of him are handing over cash to each other.

It has gotten so obvious that Group text Invites to these events now includes the stipulation that each family is responsible for their own dinner cost because we are tired of his crap. Since this note has been added he has not attended the last couple of opportunities
It's the point that one shouldn't have to ask or tell him... Everyone else can figure out how much their meal was.. He has a family of 6 youngest 16 not poor. We are not eating at 5* places.

So my family does not go out with his family together. But when the in laws are celebrating some event you have to invite all the siblings