Q9s becomes flush

[Unstable James]

MP1 is 94/18/.69 over 33 hands.
MP3 is 49/9/.71 over 35 hands.

With all the limpers, I felt good about limping behind with this hand on the button. Thoughts? Was my flop and turn play decent? What is my best course of action on the river?

Poker Stars
Limit Holdem Ring game
Limit: $0.25/$0.5
9 players
Converter

Stack sizes:
UTG: $2.20
UTG+1: $11.95
MP1: $3.75
MP2: $4.45
MP3: $13.85
CO: $19.25
Hero: $13.85
SB: $14.30
BB: $5.30

Pre-flop: (9 players) Hero is Button with Q[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img]
UTG calls, UTG+1 folds, MP1 calls, MP2 calls, MP3 (poster) checks, CO calls, Hero calls, SB calls, BB (poster) checks.

Flop: A[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/heart.gif[/img] 8[img]/images/graemlins/club.gif[/img] (8SB, 8 players)
SB checks, BB checks, UTG checks, <font color="#cc0000">MP1 bets</font>, MP2 folds, MP3 calls, CO calls, <font color="#cc0000">Hero raises</font>, 3 folds, MP1 calls, MP3 calls, CO calls.

Turn: 3[img]/images/graemlins/club.gif[/img] (8BB, 4 players)
MP1 checks, MP3 checks, CO checks, <font color="#cc0000">Hero bets</font>, <font color="#cc0000">MP1 raises</font>, MP3 calls, CO folds, <font color="#cc0000">Hero 3-bets</font>, <font color="#cc0000">MP1 caps</font>, MP3 calls, Hero calls.

River: J[img]/images/graemlins/heart.gif[/img] (20BB, 3 players)
<font color="#cc0000">MP1 bets</font>, MP3 calls, Hero...