[spydog]

I wouldn't cap this flop. Instead, I would just call the 3-bet and go for a CR if I hit my flush.

Once the button caps the turn and raises the river I would give credit for the nut flush. Check raising the river is probably your best play because you have a better chance of getting an extra bet out of the SB, rather than making him call 2 cold. Plus, you only cost yourself 3 BBs instead of 4 when you are up against the nuts.