10/20 Taj hand. Ready, fire, aim!

[GreywolfNYC]

So I'm at the table of my dreams at the Taj. The gentleman on my right is playing every hand while he downs one Remy Martin after another. By the end of the evening he has lost about 800 bucks and his power of speech.
The villain here is a typical player in this donkfest; too loose/passive/aggressive only when he's got the goods kind of guy. Plays way too many hands and goes way too far with them.
Anyway, I'm UTG with AK off. I raise. Villain calls in the CO, and cognac man in the BB calls of course.
Flop comes K, 10, rag. Suits are irrelevant. I bet, CO calls, BB calls of course.
Turn is another K. I bet, CO calls, BB folds and calls for another Remy. I'm starting to wonder why the CO is still in this hand, but I went into brain-lock and didnt give it another thought.
River is a 9.
I bet, natch, and the CO raises. I call, muttering something brilliant like, "Waddaya got? K 10?" CO rolls 99 and MHING. (Weep not for me as it was an otherwise very profitable evening.)
Standard or does anyone here slow down and check the river?