3/6 RR flush. Push or call?

[iremmats]

Party Poker No-Limit Hold'em, $ Hero (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

CO ($613.70)
Button ($470.47)
SB ($1446.84)
Hero ($1618.39)
UTG ($591)
MP ($770)

Preflop: Hero is BB with Q, J. SB posts a blind of $3.
i]4 folds[/i]SB (poster) completes, Hero raises to $18,SB calls $18.

Flop: ($48) T, 9, 4 (2 players)
SB checks, Hero bets $40, SB calls $40.

Turn: ($128) 2 2 players)
SB checks, Hero bets $88, SB calls $88.

River: ($304) 8 2 players)
SB bets $288.

Final Pot: $592

Fi is very good regular at 3/6. 20/16/3. I got a strong feeling he has the flush. But Ax should be ruled out because of prefop action right? And most Kx too?