Flopped nut flush with 4 clubs in hand, river makes str8 fl possible

This is the first hand that Hero has played on this table. No reads.

PokerStars Pot-Limit Omaha High, $0.50 BB (9 handed) hand converter

saw flop|<font color="#C00000">saw showdown</font>

MP1 ($15.45)
MP2 ($10)
<font color="#C00000">Villain ($48)</font>
<font color="#C00000">Hero ($50)</font>
Button ($37.55)
SB ($16)
BB ($78.80)
UTG ($21.35)
UTG+1 ($176.10)

Preflop: Hero is CO with 4 [img]/images/graemlins/club.gif[/img] 5 [img]/images/graemlins/club.gif[/img] 8 [img]/images/graemlins/club.gif[/img] A [img]/images/graemlins/club.gif[/img] Hero posts a blind of $0.50.
UTG calls $0.50, UTG+1 calls $0.50, <font color="#666666">1 fold</font>, MP2 calls $0.50, Villain calls $0.50, Hero checks, Button calls $0.50, SB completes, <font color="#CC3333">BB raises to $1</font>, UTG calls $0.50, UTG+1 calls $0.50, MP2 calls $0.50, Villain calls $0.50, Hero calls $0.50, Button calls $0.50, SB calls $0.50.

Flop: ($8) 9[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(8 players)</font>
SB checks, BB checks, UTG checks, UTG+1 checks, MP2 checks, <font color="#CC3333">Villain bets $3</font>, Hero calls $3, Button folds, SB folds, BB folds, UTG folds, UTG+1 folds, MP2 folds.

Turn: ($14) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, Hero checks.

River: ($14) J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Villain bets $10</font>

Hero? Who folds, just calls, and re-raises here.

Furthermore, suppose you're the Villain and you have a K flush on flop against 7 opponents. What do you bet on flop (if anything) and what do you do on the turn and river when your opponent is so passive.

BTW, I'm not the hero so don't get insulting about the slowplay here.