gay river, what's my plan?

[hotbacon]

SB literally just sat down last orbit, so no reads. What's my play vs a complete unknown?
Poker Stars - No Limit Hold'em Cash Game - $2/$4 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $478.10
Hero (BB): $415.40
UTG: $375.65
MP: $956.95
CO: $406.00
BTN: $389.30

Preflop: Hero is dealt J[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/spade.gif[/img] (6 Players)
3 folds, BTN calls $4.00, SB calls $2.00, <font color="red">Hero raises to $16.00</font>, BTN calls $12.00, SB calls $12.00

Flop: ($48) Q[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/club.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $32.00</font>, BTN folds, SB calls $32.00

Turn: ($112) 9[img]/images/graemlins/spade.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $88.00</font>, SB calls $88.00

River: ($288) J[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">SB bets all-in for $342.10</font>, Hero...

[Praetor]

fold

[Jim6200]

fold, everything hes done suggests hes flushing and if hes just sat down its unlikely hes making a huge bluff.

[JKratzer]

disown the river and resign yourself to the fact you'll never have grandkids.

[FireStorm]

Fold, your opponent has a flush. He's not doing this with anything else.

[Play4Pride]

looks like a standard fold.