KQo in heavy river

Table is 0,5/1 $ LAG. Dealer is loose. SB is weak and very loose. Both players are somewhat unpredictable and might call with a lot of hands.

Hero is CO and holds [Qh Kd]. 3 players limp, Hero calls, 2 players call, BB checks. (7 players, 3,5 BB)

FLOP:[Qd Jh 4d]
5 players check, Hero bets, Dealer calls, SB calls, BB folds, 2 players call, 1 fold. (5 players, 6 BB)

TURN is Qs: complete table [Qd Jh 4d Qs]
SB checks, UTG1 checks, UTG+1 checks, Hero bets, Dealer raises, SB calls, 2 folds, Hero calls. (3 players, 12 BB)

RIVER is 8d: complete table [Qd Jh 4d Qs 8d]
SB checks, Hero checks, Dealer bets, SB raises, Hero ??

The pot is very big. I have 3 of a kind Qs with a good kicker. I don´t think that AQ is a likely holding, because it would have been raised preflop. A reraise on the river indicates a very strong hand, but what can it be given the opponents? A flush is most likely. Should I call 2 cold because of the pot size or fold, because he is probably beaten?

Result:
Why do the Instant Graemlins not work for me? Answer is welcome!!! I will post the result separately.