NL600 vs. 4bet....no brainer, right?

[mce86]

I dont read the "fold kk preflop threads"
villian is 21/10...no reads
Full Tilt No-Limit Hold'em, $6 BB (8 handed) Full Tilt Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG+1 ($576)
MP1 ($1287.65)
MP2 ($630)
CO ($520)
Button ($927.90)
Hero ($495)
BB ($603)
UTG ($496.80)

Preflop: Hero is SB with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises to $21</font>, MP1 calls $21, <font color="#666666">1 fold</font>, CO calls $21, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $114</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises to $597 (All-In)</font>, MP1 folds, CO folds, Hero ?