Lol Cafe...
Before looking at spoiler:
I had to go back and re-read the hand cause I read it as an open and a 3bet... Oops. I'd sometimes over-call here just because we're in position and it's going to be easy to take pots away a lot of the time, but Isoing seems fine too.
The flop call is perhaps suspect unless you know he's going to be leading out with complete air and giving up the pot a lot on later streets. You've given no reads though so I'll assume there were none. He's going to do this a lot with aces in his hand, and perhaps flush draws, which I suppose makes the argument for calling the flop bet stronger.
Unfortunately he can check the turn with basically his entire flop betting range, either checking weaker aces for pot control, checking his air to give up, or checking something like two pair that is unlikely to get beaten. I'd probably err on the side of this indicating weakness, and I'd probably have gone for a semibluff here. The 9 helps us out a fair amount pot
equity-wise, since it's likely that any 9 or any K gives us the best hand, as well as any diamond. I'd probably go about 50-60% pot.
As played, on the river, I'm not going to hero call here with no history, so unless you've got a VERY strong feeling of what the smile that you THINK is fake means, just fold. It's an enormous bet, and as a general rule, people don't
bluff the river enough, or for big enough amounts.
After looking at spoiler:
You jerk
🙂