Middle 2 Pair Live

[FireStorm]

X-Post. Sorry, but MSNL offers no responses to live play threads, I should have known better.

Poorly played but not entirely out of line 5/5 NL club game. 9 handed. My stack size is just over 600, I cover both Villains, my image is tight, solid "plays two hands an hour" (I actually see a decent number of flops but this is commentary from a guy with like a 75 VPIP).

Qd7d in the SB. Someone in MP opens for $15, BTN calls, I call (bad, I know), BB calls. 4 to flop, $60.

BB is a maniac who plays every pot and shows down any two. BTN is a bit of a nit, extremely tight, never shows down anything bad.

Flop AQ7r. I check (good? bad?), BB bets 45, BTN calls 45, I call 45.
Turn 5, puts backdoor heart draw up. I check, BB bets 45, BTN suddenly pops it to $145. Hero .... ?

If you call, what is your plan on rivers of:
Q/7
Low Heart
Total brick (3d?)
Broadway Card