I visited my second cousin a few summers ago. We were sitting on a dock on a lake just chatting one evening when a few people came up to talk to us. The first was a guy that was calling out to his buddies in a boat on the lake. He was like "sorry for disturbing you love birds". The second was a couple in their 60s who told us that we reminded them of themselves "when they were younger".
We didn't correct either of them, that would have just made it even more awkward. "No, we're actually related", fucking cringe.