My second cousin was always very introverted. Nobody ever really saw him and he never really met anyone beyond immediate family due to him just not being interested in knowing any of us. He left home and cut everyone off. Hell, I had no idea he existed.
Fast forward and my first cousin is excited to bring her husband to the family reunion. The two eloped, so we did not know who this mystery man was. She walks up and… there’s our second cousin with her. The older family members knew exactly who he was and, well… they were expecting and married, so we said f@#k it and just had the family reunion. We don’t mention the cousin thing because it’s been acknowledged and we all decided to move past it as to not make them feel weird.