TPGK: Confused once again

[R6MC]

Almost identical situation occured yesterday when I had AK.
Do you see reason for a fold here? If you continue in the hand whats your play on later streets being OOP? VILLIANS standard preflop raise is 4xbb. Also, as a side note, does anyone ever check this flop considering it is so dry?

Party Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $133.42
Hero (BB): $145.53
UTG: $43.75
MP: $53.60
CO: $100.00
BTN: $88.60

Preflop: Hero is dealt A[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/club.gif[/img] (6 Players)
2 folds, <font color="red">CO raises to $4.00</font>, 2 folds, Hero calls $3.00

Flop: ($8.50) 6[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $4.00</font>, <font color="red">CO raises to $16.00</font>, HERO???