Rivered 2nd Nut flush but paired board - Value Bet River OOP?

[Grandma_DOG]

I'd been running roughshod over the table. My agg factor was over 5.0 for the 100+ hands I'd played. There was a LAG in the game, but not in the hand, so I was hoping to take the pot down on the Turn. But when the flush hit, I didn't know if they had stayed in for a runner runner low draw (which happens alot at this level), or a flush (very worried about) or trips (not as likely). Do I value bet on river?


Poker Stars
Limit Omaha Ring game
Limit: $1/$2
10 players
Converter

Pre-flop: (10 players) HERO is BB with Q[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/spade.gif[/img]
UTG folds, UTG+1 calls, <font color="#cc0000">UTG+2 raises</font>, MP1 folds, MP2 calls, 4 folds, HERO calls, UTG+1 calls.

Flop: 9[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img] (8.5SB, 4 players)
<font color="#cc0000">HERO bets</font>, UTG+1 folds, UTG+2 calls, MP2 calls.

Turn: 3[img]/images/graemlins/spade.gif[/img] (5.75BB, 3 players)
<font color="#cc0000">HERO bets</font>, UTG+2 calls, MP2 calls.

River: 9[img]/images/graemlins/heart.gif[/img] (8.75BB, 3 players)
HERO... ?

Results:
Final pot: 8.75BB