KK in MP - turn check?

[Fiddler]

Not much of a read on these guys since I've never seen them before but SB could be very aggro on the turn without much... although it might have been against a specific player that had left the table at this point. UTG hadn't made an impression either way.

Absolute Poker 2/4 Hold'em (5 handed) converter

Preflop: Hero is MP with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
UTG calls, <font color="#CC3333">Hero raises</font>, Button calls, SB calls, <font color="#666666">1 fold</font>, UTG calls.

Flop: (9 SB) 6[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">UTG bets</font>, <font color="#CC3333">Hero raises</font>, Button folds, <font color="#CC3333">SB 3-bets</font>, UTG calls, <font color="#CC3333">Hero caps</font>, SB calls, UTG calls.

Turn: (10.25 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, UTG checks, Hero checks.

Freecards for pocket pairs and aces where the A[img]/images/graemlins/spade.gif[/img] gets the best deal with a lot of outs but he is coming either way... and that is if there is an ace out to worry about since the flop looked a bit suspicious. But I don't know. [img]/images/graemlins/confused.gif[/img]