TPTK Trouble

[11t]

Villain was a caling station, is this an obvious fold?

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) converter

BB ($28.3)
UTG ($31.92)
MP ($48.76)
Hero ($57.7)
Button ($41.79)
SB ($33.79)

Preflop: Hero is CO with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.25.
UTG calls $0.50, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2</font>, Button calls $2, <font color="#666666">2 folds</font>, UTG calls $1.50.

Flop: ($6.75) 7[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, <font color="#CC3333">Hero bets $4</font>, Button calls $4, UTG calls $4.

Turn: ($18.75) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, <font color="#CC3333">Hero bets $10</font>, Button calls $10, UTG folds.

River: ($38.75) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $8</font>, Hero calls $8.

Final Pot: $54.75

[heretowin]

I don't think this is an obvious fold. Pre-flop he could have been calling you with a low pocket pair, but, I think the only thing you have to be worried about is the A-Q.