25NL KK vs a tightie

[Bonesy]

Ultimate Bet
No Limit Holdem Ring game
Blinds: $0.10./$0.25.
5 players
Converter

Stack sizes:
UTG: $28.06
CO: $41.45
Button: $18.99
SB: $8.77
Hero: $24.99

Villain is pretty straightforward. 26/14/1.8. I'm sure he looks at me in a similar way if he is paying attention. We have played quite a bit at the same tables. Comments on any street please.

Pre-flop: (5 players) Hero is BB with K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img]
2 folds, <font color="#cc0000">Button raises to $0.85</font>, SB folds, <font color="#cc0000">Hero raises to $2.65</font>, Button calls.

Flop: T[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/diamond.gif[/img] ($5.4, 2 players)
Hero checks, Button checks.

Turn: 3[img]/images/graemlins/heart.gif[/img] ($5.4, 2 players)
<font color="#cc0000">Hero bets $4</font>, Button calls.

River: 9[img]/images/graemlins/heart.gif[/img] ($13.4, 2 players)
Hero checks, <font color="#cc0000">Button bets $4.5</font>, Hero???