extracting value?

[soah]

2/4 6-max at Stars

UTG raises, someone folds, I call with AKo, button calls, TAG in SB calls, complete unknown in the BB reraises to $52, UTG calls, I call, button folds, SB calls. Effective stacks $400. Four players to the flop for $52 each..!!

Flop AA5 rainbow. $220 in pot. Checked to me. I bet $75. Fold, fold, SB calls.

Turn 7, check check.

I was hoping to sucker in SB for all his chips with what appeared to be a big pocket pair. But, I also have to consider that by letting him stick around, I'll lose the pot by the river about 10% of the time, and despite all my careful trapping, he still might get away at the end. So I'm not so sure if I like this line or not. Alternate lines would be to blast away at the flop and hope it looks like a scared pocket pair (or bluff) trying to take down the pot, pushing the turn (screw deception, just get the chips in now!), make another milking bet on the turn, or check the flop (I'm pretty sure that sucks a lot).