I have an etiquette question.
I was in a home game with complete strangers. One guy was a bit older (60+) and obviously had bad eyesight. A few times, when I wasn't in the hand, I read the board to him because he clearly had difficulty seeing it, even though they were jumbo Copag cards and he was in the middle of the table. One time he called a river bet and said "I didn't see the flush."
Fast forward an hour or two, and the older guy raised preflop, bet the flop and turn in position, and then faced a river donk jam on a four-heart board. He called, his opponent said "straight, do you have a flush?" He said "no" and maybe he mucked his hand but right in front of him.
I did not think he had mucked, and I said "You don't have a heart?" He checked and he did, indeed, have a flush.
His opponent threw a fit, saying he had already mucked. Maybe he did or didn't, but the guy was mad at me for saying anything. Did I breach etiquette there? What if I had said something like "there are four hearts out there"?