AK hand with 4 flush

[hobbsmann]

New to the table so no reads. I'm pretty sure betting this river is wrong after getting called on the turn, but I wasn't sure what to do if villain bet. So check/fold or check/call? Also any other comments welcome.

Party Poker 20.00/40.00 Hold'em <font color="#0000FF">(5 handed)</font> link

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 folds</font>, <font color="#CC3333">CO raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero 3-bets</font>, CO calls.

Flop: (6.50 SB) A[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, <font color="#CC3333">Hero 3-bets</font>, CO calls.

Turn: (6.25 BB) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, CO calls.

River: (8.25 BB) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks.