AK against lag

[PleasureGuy69]

Villain is 42/23/4.8

Call or fold?

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $67.95
BB: $51.50
Hero (UTG): $94.20
MP: $45.75
CO: $73.85
BTN: $5.10

Preflop: Hero is dealt A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img] (6 Players)
<font color="red">Hero raises to $1.75</font>, MP folds, CO calls $1.75, BTN folds, SB calls $1.50, BB folds

Flop: ($5.75) 3[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] (3 Players)
<font color="red">SB bets $5.75</font>, <font color="red">Hero raises to $15.00</font>, CO folds, <font color="red">SB raises all-in to $66.20</font>, Hero ???