Party Poker No-Limit Hold'em, $ BB (6 handed) converter

CO ($36)
Button ($32.6)
Hero ($46.2)
BB ($24.2)
UTG ($25.53)
MP ($25.4)

Preflop: Hero is SB with A, A. Hero posts a blind of $0.1.
3 folds, Button raises to $1, Hero (poster) raises to $1.9, 1 fold, Button calls $1.

Flop: ($4.25) 9, K, K (2 players)
Hero bets $3, Button calls $3.

Turn: ($10.25) 5 (2 players)
Hero checks, Button checks.

River: ($10.25) 9 (2 players)
Hero bets $1, Button raises to $5, Hero folds.

Final Pot: $16.25

Button seemed like a decently tight player, fairly aggro after the flop... I bet out to see if I could take it right there, but he called. I thought I was beat at that point, and shouldn't have put that extra dollar in the river - I was trying to make it seem like I was going for the check raise, except that's what happened. He could have been pulling a fast one with AQ or QQ, but I think he had the king...