200nl: set on weird board

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Full Tilt Poker, $1/$2 NL Hold'em Cash Game, 9 Players
LeggoPoker Hand History Converter

MP1: $480.80
MP2: $232.55
Hero (CO): $280
BTN: $201.35
SB: $162.75
BB: $247.80
UTG: $206.40
UTG+1: $113.75
UTG+2: $85.70

Pre-Flop: 3[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/heart.gif[/img] dealt to Hero (CO)
UTG calls $2, UTG+1 calls $2, UTG+2 calls $2, MP1 calls $2, MP2 folds, Hero calls $2, BTN calls $2, SB calls $1, BB checks

Flop: ($16) A[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/club.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (8 Players)
SB checks, BB checks, <font color="red">UTG bets $16</font>, 3 folds, Hero calls $16, BTN calls $16, 2 folds

Turn: ($64) J[img]/images/graemlins/spade.gif[/img] (3 Players)
<font color="red">UTG bets $46</font>, Hero calls $46, BTN calls $46

River: ($202) 6[img]/images/graemlins/spade.gif[/img] (3 Players)
UTG checks, Hero checks, <font color="red">BTN bets $137.35 and is All-In</font>, UTG folds, Hero...?