QJs in BB, runner-runner flush

[kureido]

Ultimate Bet 0.25/0.50 Hold'em (9 handed) converter

MP2 and MP3 are typical loose/semi-aggressive microlimit players; MP3 is short-stacked at 9BB.

Preflop: Hero is BB with J[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img]. Hero posts a blind of $0.25.
<font color="666666">1 fold</font>, UTG calls, UTG+1 calls, <font color="666666">1 fold</font>, MP2 calls, MP3 calls, <font color="666666">2 folds</font>, Hero checks.

Flop: (5 SB) 8[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="blue">(5 players)</font>
Hero checks, UTG checks, UTG+1 checks, <font color="CC3333">MP2 bets</font>, MP3 calls, Hero calls, UTG folds, UTG+1 calls.

I know this was a loose play. Would anyone else have made it? After I decided to play it, I considered betting out for a moment, but MP2 loves betting on the cutoff or the button and I figured he'd bet it for me. And he did.

Turn: (4.50 BB) 7[img]/images/graemlins/club.gif[/img] <font color="blue">(4 players)</font>
Hero checks, UTG+1 checks, <font color="CC3333">MP2 bets</font>, MP3 calls, Hero calls, UTG+1 folds.

Picked up a runner, let MP2 bet it for me again.

River: (7.50 BB) 3[img]/images/graemlins/club.gif[/img] <font color="blue">(3 players)</font>
Hero checks, <font color="CC3333">MP2 bets</font>, <font color="CC3333">MP3 raises</font>, Hero calls, MP2 calls.

Okay, I hit my flush and fully intended to check-raise the hell out of MP2 and MP3, but then MP3 raised, and I was afraid of K[img]/images/graemlins/club.gif[/img] x[img]/images/graemlins/club.gif[/img] or A[img]/images/graemlins/club.gif[/img] x[img]/images/graemlins/club.gif[/img]. Is this thinking too weak? Should I have 3-bet this turn?

Final Pot: 13.50 BB

-b