PP 5/10 Call this down on the river?

[Aximillian]

Table is pretty good at 30/6.3
UTG+1 is new at the table and unknown

Party Poker 5/10 Hold'em (8 handed) FTR converter on zerodivide.cx

Preflop: Hero is Button with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img]. MP1 posts a blind of $7.
UTG calls, UTG+1 calls, MP1 (poster) checks, <font color="#666666">1 fold</font>, CO calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, BB calls, UTG calls, UTG+1 calls, MP1 calls, CO calls.

Flop: (12.80 SB) 6[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(6 players)</font>
BB checks, UTG checks, <font color="#CC3333">UTG+1 bets</font>, MP1 folds, CO calls, <font color="#CC3333">Hero raises</font>, BB folds, UTG folds, UTG+1 calls, CO folds.

Turn: (8.90 BB) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, Hero checks.

River: (8.90 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG+1 bets</font>, Hero calls.

Final Pot: 10.90 BB

What's the best line? Raise even with the scary flop, or just call it down.