NL 50: River decision with jack high flush

[08-15am]

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 ($51.55)
MP3 ($37)
CO ($73.20)
Button ($26.50)
SB ($51.55)
Hero ($68.05)
UTG ($9.95)
UTG+1 ($48.15)
MP1 ($50)

Preflop: Hero is BB with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">CO raises to $1.5</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $5.5</font>, CO calls $3.50.

Flop: ($10.75) T[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $7</font>, CO calls $7.

Turn: ($24.75) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, CO checks.

River: ($24.75) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, <font color="#CC3333">CO bets $10.5</font>, Hero ?