2K6m. bottom set facing a big river push.

[SA125]

Maybe it's the opposite, but his 3/4 flop and turn bets look defensive to me, while the river overbet looks like he wants a call. If I felt like that was the case at the time, I fold.

I can see him having AQ here as easily as J9. It sucks giving your chips to unk's who play wild and get there. Which is why I consistently play flop/turn faster than I used too.