Middle pair with EP Bettor

[Aaron_]

Straightforward PFR, limpers are all loose and passive. What do you do in this spot, and what's your plan for the rest of the hand? Many thanks guys

Cryptologic 0.25/0.50 Hold'em <font color="#0000FF">(8 handed)</font> link

Preflop: Hero is CO with 7[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">3 folds</font>, MP3 calls, Hero calls, Button calls, SB completes, <font color="#CC3333">BB raises</font>, MP3 calls, Hero calls, Button calls, SB calls.

Flop: (10.00 SB) 8[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">BB bets</font>, MP3 calls, Hero? (with 2 left behind you)