3-way river, set vs flush/straight draw big river bet

[winningfish]

$3/$6 6-handed
$850 effective stacks

Dealt to Hero: [3 [img]/images/graemlins/diamond.gif[/img] 3 [img]/images/graemlins/club.gif[/img]]

PREFLOP: UTG folds, Hero calls, CO folds, BU calls, SB folds, BB checks.

FLOP: ($21) [4 [img]/images/graemlins/spade.gif[/img] A [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/club.gif[/img]]
BB bets $14, Hero calls, BU calls.

TURN: ($63) [4 [img]/images/graemlins/spade.gif[/img] A [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/club.gif[/img]] [3 [img]/images/graemlins/spade.gif[/img]]
BB checks, Hero bets $50, BU calls, BB calls.

RIVER: ($213) [4 [img]/images/graemlins/spade.gif[/img] A [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/club.gif[/img]] [3 [img]/images/graemlins/spade.gif[/img]] [K [img]/images/graemlins/spade.gif[/img]]
BB bets $150.. Hero??

BB has been LAG but isn't reckless. BU has been TAG. Limped pot so it's possible someone's holding 2, especially BU. I had a bad hunch that someone rivered a backdoor flush..

[Teh1337zor]

id fold

[jj12]

fold

[Praetor]

raise pf, dont like flop peel

[dchz]

how do you not raise the turn for value?

[ChrisV]

Raise pf, don't call flop. I'm pretty mystified by BB's hand here, but I'm folding, he should have at least a two to bet into two players like that.

[danjohncochane]

-Raise it up preflop
-Fold flop
-Turn ok
-Fold river, your always beat here.

[JackAll]

You f'd this hand up on the flop.