This sister came with receipts when trying to expose the truth that her gentle-parenting sibling was concealing behind a social media pity party spun into a web of lies. Sure, we're all for being nice to people, and there's no argument that this should extend to your kids so you can avoid passing your generational trauma onto them as much as possible. However, if you want your kids to grow up into fine young adults, it's probably important that you don't also teach them to be woefully entitled…