Proper River Bet/Fold Line?

[Toonces]

20/40 game at Resorts East Chicago (that plays similar on online 2/4 game).

I rarely (if ever) make a bet fold, and have a tendency to call down turn or river raises on good hands when I know I'm beaten. I've also been trying to play WA/WB situations properly, which I read this as one.However, after the hand, I had a sick feeling I played it wrong.

Hero holds Q [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/club.gif[/img]. The maniac is in UTG+1 and raises about 25% of hands today, but often raises close to 50%. Hero has reraised the maniac to isolate a couple of times, something that the maniac has just mentioned to the table prior to this hand. The button is a strong (but not necessarily tricky) player who I don't believe has cold-called yet. The small blind is a calling station.

UTG folds. Maniac Raises. Hero Reraises. 3 folds. Button calls 3 bets. SB calls. Maniac calls.


Flop13 SB) 2 [img]/images/graemlins/spade.gif[/img] 2 [img]/images/graemlins/heart.gif[/img] 6 [img]/images/graemlins/spade.gif[/img].

Maniac checks. Hero bets. Button Raises. SB and maniac folds. Hero calls.

(at this point, I am reading the Button for AA-TT or AK, possibly AQ. After the two folds, I'm treating this as WA/WB).

Turn: (8.5 BB) 4 [img]/images/graemlins/club.gif[/img]

Hero checks. Button Bets. Hero Calls.

(continuing a WA/WB line)

River: (10.5 BB) K [img]/images/graemlins/diamond.gif[/img].

Hero Bets (after a fair pause). River Raises. Hero Folds.

I think that JJ, TT or even 99 has to call me here, so bet/fold seems to be the right line. But is this too big of a pot to fold to a raise? Is it possible that my pause induced a raise from bluffs or worse made hands?