Quick flop question

[Rico Suave]

Button is okay, with a 7.5% pfr over a decent sample.
MP1 is loose passive
CO is unknown.

7 handed
I have 8 [img]/images/graemlins/heart.gif[/img]8 [img]/images/graemlins/club.gif[/img] in MP2. CO posts a blind.

MP1 limps, I raise, CO calls, Button 3-bets, blinds fold and the 3 of us all call.

4 players for 13sb Q [img]/images/graemlins/heart.gif[/img]7 [img]/images/graemlins/heart.gif[/img]4 [img]/images/graemlins/heart.gif[/img]
Checked to button who bets, MP folds, I....?

What is my play?

If MP1 had called the flop bet does that change your plan?

--Rico