NL200- facing a possible river bluff?

[solvine]

villain is 46/12/0.3 playing kinda loose

Full Tilt Poker
$1/$2 No Limit Hold'em Ring Game
8 Players
LegoPoker Hand Converter

<font color="black">Stack Sizes</font>
BB: $17.65
UTG: $252.60
UTG+1: $202.95
MP1: $139.90
MP2: $218.90
CO: $199
BTN: $183
Hero (SB): $204.3

<font color="black">Preflop:</font> T[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img] ($3, 8 players)
UTG folds, UTG+1 folds, MP1 calls $2, MP2 folds, CO folds, <font color="red">BTN raises to $4</font>, Hero calls $3, BB calls $2, MP1 calls $2

<font color="black">Flop:</font> T[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/club.gif[/img] ($16, 4 players)
<font color="red">Hero bets $12</font>, BB folds, MP1 calls $12, BTN calls $12

<font color="black">Turn:</font> T[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/club.gif[/img] [5[img]/images/graemlins/spade.gif[/img]] ($52, 3 players)
<font color="red">Hero bets $35</font>, MP1 folds, BTN calls $35

<font color="black">River:</font> T[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/spade.gif[/img] [5[img]/images/graemlins/diamond.gif[/img]] ($122, 2 players)
Hero checks, <font color="red">BTN bets $64</font>, Hero ???