400NL- weird river spot with a flush

[Veron]

Villain is a 21/17/3 over 700 hands.
His Fold BB to steal = 77
He seems solid and is 4tabling or so...

We don't have history and my image is TAG

Party Poker No-Limit Hold'em, $4 BB (6 handed) Party Poker Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($565.25)
MP ($372)
CO ($377.11)
Hero ($619.70)
SB ($1)
BB ($853.07)

Preflop: Hero is Button with 9[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/club.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $16</font>, <font color="#666666">1 fold</font>, BB calls $12.

Flop: ($34) 8[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $24</font>, BB calls $24.

Turn: ($82) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets $64</font>, BB calls $64.

River: ($210) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets $120</font>, Hero ??