can i fold a straight to one bet?

[bigalt]

My flopped straights never seem to hold up, so maybe I'm seeing monsters here. MP1 is a super-fish, 75/0/.5 and one of the first couple hands with button.

Party Poker 0.5/1 Hold'em (9 handed) converter

Preflop: Hero is MP3 with Q[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, MP1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, CO calls, Button calls, <font color="#666666">1 fold</font>, BB calls, UTG+1 calls, MP1 calls.

Flop: (12.50 SB) T[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
<font color="#CC3333">BB bets</font>, UTG+1 folds, <font color="#CC3333">MP1 raises</font>, Hero calls, CO folds, Button calls, <font color="#CC3333">BB 3-bets</font>, MP1 calls, <font color="#CC3333">Hero caps</font>, Button calls, BB calls, MP1 calls.

Turn: (14.25 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, <font color="#CC3333">MP1 bets</font>, Hero ???

Can I ever excuse a fold here, smelling a flush from either MP1 or the button who's been calling along for some reason? Or are they just as likely to be on a straight draw?

I don't suppose I can possibly protect my hand anymore against a 4-flush, would I raise for value here or just call along and hope it's not getting raised behind me? With all the action so far I figure it's costing me at least 4 BB to show this down.

All options felt shitty to me here, I really didn't want to see that diamond fall on the turn.