nl100: top 2 in a weird spot

[AMT]

i just sat, theyve probably played 3-4 hands since ive been at the table.

PokerStars No-Limit Hold'em, $1.00 BB (5 handed) pokerhand.org hand converter

MP ($367.95)
Button ($116.90)
SB ($94.35)
Hero ($100)
UTG ($103.55)

Preflop: Hero is BB with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises to $4</font>, <font color="#666666">3 folds</font>, Hero calls $3.

Flop: ($8.50) J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">UTG bets $6</font>, <font color="#CC3333">Hero raises to $18</font>, <font color="#CC3333">UTG raises to $50</font>