Thin river value HU ($1/1)

[wazz]

We've been playing HU for about half an hour but villain is significantly mixing up his play with some pure bluffs, semibluffs and thin value-bets. He seems to be adjusting better than me and putting me under lots of pressure, but he will stack off far too light (i.e. he seems to be bet/3betting for pot with any draw + pair on almost any board). I've not seen him turn into a callstation OOP here and am wondering whether he's trapping me, or whether he's just wanting to call me down with K9 or something. I figure that if he's got K9 he'll be willing to call almost a full pot-size bet as he is very willing to put me on missed draws, but I just got the feeling on the river he was trying to play A9 for pot control OOP. Who finds a river value-bet?

Poker Room skin
Pot Limit Omaha Ring game
Blinds: $1/$1
2 players
Converter

Stack sizes:
hero: $344.80
BB: $218.45

Pre-flop: (2 players) hero is SB with Q[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">hero raises to $1.65</font>, BB calls.

Flop: 9[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img] ($3.3, 2 players)
BB checks, <font color="#cc0000">hero bets $5.3</font>, BB calls.

Turn: 2[img]/images/graemlins/diamond.gif[/img] ($13.9, 2 players)
BB checks, <font color="#cc0000">hero bets $15.9</font>, BB calls.

River: 6[img]/images/graemlins/heart.gif[/img] ($45.7, 2 players)
BB checks, hero checks.

Results:
Final pot: $45.7