AA - min c/r on somewhat coordinated board

Hi.
I was new at the table, so i haven't had any reads yet.

Party Poker No-Limit Hold'em, $0.04 BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

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

UTG+1 ($5.64)
<font color="#C00000">UTG+2 ($4.48)</font>
MP1 ($4.95)
MP2 ($2.70)
<font color="#C00000">MP3 ($0)</font>
<font color="#C00000">Hero ($5)</font>
Button ($1.82)
SB ($1.96)
BB ($1.98)
UTG ($6.10)

Preflop: Hero is CO with A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises to $0.08</font>, UTG+2 calls $0.08, <font color="#666666">1 fold</font>, MP2 calls $0.08, <font color="#CC3333">Hero raises to $0.4</font>, <font color="#666666">4 folds</font>, UTG+2 calls $0.32, MP2 calls $0.32.

Flop: ($1.34) 6[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
UTG+2 checks, MP2 checks, <font color="#CC3333">Hero bets $0.75</font>, <font color="#CC3333">UTG+2 raises to $1.5</font>, MP2 folds, Hero...

I don't know what his min-raise preflop means... Normally opponents at NL5 play draws passively, so i think chances are higher that he also has an overpair or tries to steal the pot.

Should I call on the flop to disguise my hand, or 3bet (i think folding is not the right play)?