Turning TP into bluff on river 4 flush vs southern

[Cap_Of_Water]

villian is 21/16/3
Not really any history except i think he percieves me as aggro postflop.

Poker Stars, $1/$2 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

Hero (UTG): $284.95
CO: $201.05
BTN: $298.35
SB: $252
BB: $199

Pre-Flop: A[img]/images/graemlins/spade.gif[/img] Q[img]/images/graemlins/club.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $8</font>, 3 folds, BB calls $6

Flop: ($17) 8[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $12</font>, BB calls $12

Turn: ($41) A[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $32</font>, BB calls $32

River: ($105) K[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $76</font>