AA with 4 to the flop

[strunks]

With 4 people seeing the flop, I was wary of a possible set. Should I have raised more pf with this many limpers? Bigger flop bet?

Paradise Poker No-Limit Hold'em, $0.25 BB (10 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">Hero ($64.50)</font>
BB ($54.75)
UTG ($49.75)
UTG+1 ($46.00)
<font color="#C00000">UTG+2 :#A500AF(Villain)/ ($133.50)</font>
MP1 ($10.00)
MP2 ($126.25)
MP3 ($29.50)
CO ($47.75)
Button ($42.50)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/diamond.gif[/img]. Hero posts a blind of $0.25. MP1 posts a blind of $0.50.
UTG calls $0.50, <font color="#666666">1 fold</font>, UTG+2 :#A500AF(Villain)/ calls $0.50, MP1 (poster) checks, MP2 calls $0.50, <font color="#666666">2 folds</font>, Button calls $0.50, <font color="#CC3333">Hero (poster) raises to $4.25</font>, <font color="#666666">1 fold</font>, UTG calls $3.75, UTG+2 :#A500AF(Villain)/ calls $3.75, MP1 calls $3.75, MP2 folds, Button folds.

Flop: ($18.50) 5[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets $12</font>, UTG folds, Villain calls $12, MP1 folds.

Turn: ($42.50) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero ???

I felt ok at this point, but bet, or check to induce a bluff?