Set but Bet on River when flush card hits

This hand is played against a 40/14/.82. The difficulty in my decision is because I turned a set in this hand and the river card brings a flush card in which he makes a reasonable sized bet. If this was just a one pair holding, I wouldn't be agonizing over the decision. What's your line for the river? Block bet; Check/call a small-medium bet; Check/Fold to a large bet or what?


FullTiltPoker Game #2648305291: Table St James (6 max) - $1/$2 - No Limit Hold'em - 15:49:16 ET - 2007/06/12
Seat 1: Psui ($205.70)
Seat 2: Edwin_balot ($246.55)
Seat 3: You Dont See Me ($200)
Seat 4: locks18 ($219.15)
Seat 5: ImthePOLICE398 ($198)
Seat 6: phobosde ($200)
Edwin_balot has 5 seconds left to act
Edwin_balot posts the small blind of $1
You Dont See Me has 5 seconds left to act
You Dont See Me posts the big blind of $2
The button is in seat #1
*** HOLE CARDS ***
Dealt to locks18 [Qc Qh]
locks18 raises to $7
ImthePOLICE398 has 15 seconds left to act
ImthePOLICE398 folds
phobosde folds
Psui folds
Edwin_balot calls $6
You Dont See Me folds
*** FLOP *** [3c 6s 7s]
Edwin_balot checks
locks18 bets $11
Edwin_balot calls $11
*** TURN *** [3c 6s 7s] [Qd]
Edwin_balot checks
locks18 has 15 seconds left to act
You Dont See Me adds $2
locks18 bets $29
Edwin_balot calls $29
*** RIVER *** [3c 6s 7s Qd] [As]
Edwin_balot has 15 seconds left to act
Edwin_balot bets $66
locks18 has 15 seconds left to act