live hand-flopped straight on 3 flush board in big ass pot

[Walker]

4/8

MP3 and CO are play the majortiy of their hands and are pretty fishy. CO is maybe slightly passive post flop

5 limpers, I limp 5 [img]/images/graemlins/diamond.gif[/img]3 [img]/images/graemlins/diamond.gif[/img] on button, SB calls, BB raises, everybody calls, I call

(15SB)Flop: A [img]/images/graemlins/spade.gif[/img]2 [img]/images/graemlins/spade.gif[/img]5 [img]/images/graemlins/spade.gif[/img]

Checked to MP3 who bets, CO raises, hero???

Plan for the rest of the hand?