2/4 6max: Aj in a really sticky situation

[Pokerstuff2]

No reads except that this guy is not a reg. His call just seemed so cold preflop I didn't know what to do.

Poker Stars, $2/$4 NL Hold'em Cash Game, 5 Players
LeggoPoker.com - Hand History Converter

BB: $382
UTG: $233.05
CO: $964.80
Hero (BTN): $466.10
SB: $819.40

Pre-Flop: J[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img] dealt to Hero (BTN)
<font color="red">UTG raises to $16</font>, CO calls $16, <font color="red">Hero raises to $53</font>, SB folds, BB calls $49, UTG calls $37, CO calls $37

Flop: ($214) J[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/club.gif[/img] (4 Players)
BB checks, UTG checks, CO checks, <font color="red">Hero bets $124</font>, BB calls $124, 2 folds

Turn: ($462) 4[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">BB bets $205 and is All-In</font>, Hero?