PLO50 A6KK heads-up pot postflop

[bluffbetter]

I know I should probably have folded the river, but what about the my flop and turn play?

PokerStars Pot-Limit Omaha High, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($49.75)
MP ($85.10)
CO ($59.20)
Button ($49.25)
SB ($47.70)
BB ($58.90)

Preflop: Hero is UTG with A[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img].
Hero calls $0.50, <font color="#666666">2 folds</font>, <font color="#CC3333">Button raises to $1.5</font>, <font color="#666666">2 folds</font>, Hero calls $1.

Flop: ($3.75) 9[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $3.6</font>, Hero calls $3.60.

Turn: ($10.95) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $6.5</font>, Hero calls $6.50.

River: ($23.95) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $12</font>, Hero calls $12.

Final Pot: $47.95