Confused

[Mercman572]

Villain is 33/13/.85

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) FTR converter on zerodivide.cx

SB ($93.30)
BB ($259.35)
UTG ($144.05)
MP ($216.31)
CO ($107.70)
Hero ($98.50)

Preflop: Hero is Button with J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.50.
[color=#666666]2 folds</font>, CO calls $1, [color=#CC3333]Hero raises to $5</font>, [color=#666666]1 fold</font>, BB calls $4, CO calls $4.

Flop: ($15.50) A[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img] [color=#0000FF](3 players)</font>
BB checks, CO checks, [color=#CC3333]Hero bets $12</font>, BB calls $12, CO folds.

Turn: ($39.50) 5[img]/images/graemlins/heart.gif[/img] [color=#0000FF](2 players)</font>
[color=#CC3333]BB bets $25</font>, Hero?

Should I just fold this? I don't know what would do this except AK, but he might've C/R'ed that on the flop.