[kuro]

Why not call and re-evaluate the river? I think your hand is just too strong to give villain credit for entering a raised pot with a 7 and lucking out to hit the flop that hard.

When you have aces, you're very seldom going to have the nuts on the flop or turn and if you fold them on this board especially with deep stacks where villains are more likely to make a move on you then you're going to spew a lot of chips. Just because a guy represents trips doesn't mean he has trips and certainly villain realizes that it's very unlikely that you have trips.