Stupid AK spot on the flop

[manupod]

54/1/2.5 over 200 hands...b/f, c/f, c/c....

1/2

Button ($60.95)
SB ($96)
BB ($217.20)
UTG ($225.40)
MP ($277.80)
Hero ($222.15)

Preflop: Hero is CO with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $8</font>, Button calls $8,

<font color="#666666">2 folds</font>.

Flop: ($19) J[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $12</font>, <font color="#CC3333">Button raises to $52.95</font>, Hero ?