Who folds this TPTK?

[kem]

Pretty standard until I'm raised on the turn. At that point I'm thinking I'm up against a straight or a flush. Who folds this, and who pays the 2 bets to call the turn raise and the probable river bet... ?

Party Poker 0.50/1 Hold'em (9 handed)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img].
UTG calls, UTG+1 folds, MP1 folds, MP2 folds, MP3 folds, CO folds, Button folds, <font color="CC3333">Hero raises</font>, BB calls, UTG calls.

Flop: (6 SB) K[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="blue">(3 players) </font>
Hero checks, <font color="CC3333">BB bets</font>, UTG calls, <font color="CC3333">Hero raises</font>, BB calls, UTG calls.

Turn: (6 BB) Q[img]/images/graemlins/diamond.gif[/img] <font color="blue">(3 players) </font>
<font color="CC3333">Hero bets</font>, BB folds, <font color="CC3333">UTG raises</font>, Hero calls.

River: (10 BB) 8[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players) </font>
Hero checks, <font color="CC3333">UTG bets</font>, Hero calls.

Final Pot: 12 BB
<font color="#990066">Main Pot: 12 BB, between UTG and Hero.</font> &gt; <font color="white">Pot won by UTG (12 BB).</font>

Results in white below: <font color="white">
Hero shows As Ks (one pair, kings).
UTG shows Ad Th (straight, ace high).
Outcome: UTG wins 12 BB. </font>