AK in 3 bet pot

[waldo027]

Villian was 27/13/2.7 after 195 hands. This has probably been gone over a million times, but should I always be taking this to the felt after 3 betting PF? I feared JJ or a weirdly played AA.

Full Tilt Poker, $0.10/$0.25 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

Hero (BTN): $36.80
SB: $25.70
BB: $10
UTG: $34.45
MP: $42.10
CO: $47.75

Pre-Flop: A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] dealt to Hero (BTN)
UTG folds, <font color="red">MP raises to $0.75</font>, CO folds, <font color="red">Hero raises to $2.50</font>, 2 folds, MP calls $1.75

Flop: ($5.35) A J 8[img]/images/graemlins/heart.gif[/img] (2 Players)
MP checks, <font color="red">Hero bets $5</font>, <font color="red">MP raises to $18</font>, Hero ???