Folding pocket KK?

[ajm36]

No reads--I was not at the table long enough. Should I have folded KK against this aggression?

Party Poker 0.5/1 Hold'em (8 handed) converter

Preflop: Hero is CO with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, Button calls, <font color="#666666">2 folds</font>, MP1 calls.

Flop: (7.50 SB) 6[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
MP1 checks, <font color="#CC3333">Hero bets</font>, Button calls, MP1 calls.

Turn: (5.25 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
MP1 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">Button raises</font>, MP1 calls, Hero folds.

River: (10.25 BB) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
MP1 checks, Button checks.

Final Pot: 10.25 BB