Anonymous wrote:You're the one who will set the tone going forward since it's your kid that wasn't invited. It sounds like B's parents recognize that the kids don't get along, (rightfully) didn't push for your kid to be invited, and are probably hoping the adult friendship can remain cool.
This for the friendship with the parents, and for the reaction from your kid. Sometimes your kid will not be invited to a party, and sometimes your kid will not want to invite someone to a party. Avoid unnecessary cruelty but also recognize that it's part of life.