$5NL 6-Max, Awkward preflop pot w/ AK OOP

[Wooden Ta Sheng]

I haven't been at the table long and my only read is that CO likeS to raise 4BBs first in and 4BBs + 1 when there's a limper.

PokerStars No-Limit Hold'em, $0.05 BB (6 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($11.93)
Hero ($10.63)
BB ($9.26)
UTG ($2.92)
MP ($5.99)
CO ($16.22)

Preflop: Hero is SB with A[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, MP calls $0.05, <font color="#CC3333">CO raises to $0.25</font>, Button calls $0.25, Hero ?

I was torn between 3-bet squeezing with no read on BTN (+ the amount I would squeeze) and calling.