There are friends of my parents who would be justifiably hurt if I did not invite them to my wedding (though none, I think, so gauche as to complain to an advice columnist)—but those are friends who also have a relationship with me, as unofficial auntie/uncle/mentor/responsible adult. They’re the ones who babysat me, or picked up birthday presents for me on business trips abroad, or took me out to dinner to congratulate me on my first job, or let me crash in their guest room on vacation road trips when I was a broke student. If they were sad about missing my wedding, it would be in the context of having watched me pass through many other life milestones and regretting not being there to witness this one as well. The absense of any of that in this letter—of any hint of how LW relates to the bride as anything other than an extension of her parents—is weird to me.