200NL Line checkup with 2 pair vs. donk

PokerStars No-Limit Hold'em, $2 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

MP2 ($218.75)
MP3 ($412.80)
CO ($109)
Button ($48.55)
SB ($326.35)
Hero ($244.70)
UTG ($83.85)
UTG+1 ($334.30)
MP1 ($44)

Preflop: Hero is BB with 2, 9.
UTG calls $2, 1 fold, MP1 calls $2, 2 folds, CO calls $2, 2 folds, Hero checks.

Flop: ($9) 2, 6, 9 (4 players)
Hero bets $8, UTG calls $8, MP1 folds, CO folds.

Turn: ($25) 8 (2 players)
Hero bets $15, UTG calls $15.

River: ($55) K (2 players)
Hero bets $35, UTG raises to $58.85, Hero calls $23.85.

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I had stacked Villian earlier when he had TPTK and I hit trips out of the BB. He had limped AK PF, and called me down the entire way.

How do you like my line?

I think you played this perfectly on every street; I hope you don't tell us your opponent ended up with KKK by the river, that's just plain depressing since he had no business to call all of those nice bets with pocket kings when you represented something much larger the entire time. Because of the flushed flop, maybe a turn check was more appropriate? I'm eager to hear other people's view of this hand.

Also, I hope he had AK or something and you ended up taking down this nice size pot.

NH.