10-10 - - good flop - - too many opponenets?

[Jon_AK]

Have a look here at this, hit a very nice flop, got raised by the button who didn't preflop raise. Good move?

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) internettexasholdem.com

SB (t1480)
BB (t1840)
Jon_AK (t1560)
UTG+1 (t1580)
MP1 (t1460)
MP2 (t1410)
MP3 (t1470)
CO (t1260)
Button (t1440)

Preflop: Jon_AK is UTG with T[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">Jon_AK raises to t100</font>, UTG+1 calls t100, <font color="#666666">3 folds</font>, <font color="#CC3333">CO raises to t180</font>, Button calls t180, <font color="#666666">2 folds</font>, Jon_AK calls t80, UTG+1 calls t80.

Flop: (t750) 8[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
Jon_AK checks, UTG+1 checks, CO checks, <font color="#CC3333">Button bets t200</font>, <font color="#CC3333">Jon_AK raises to t600</font>, UTG+1 folds, CO folds, <font color="#CC3333">Button raises to t1260</font>, Jon_AK????