An overpair hand against 2 others who like their hands (scary board)

[_Kevin_]

It was SB's 2nd hand so I have no read. UTG+1 is sLA-A. I have UTG+1 pegged for an overpair (not A's) so I'm pretty sure I have him beat. It SB that's troubling. Was this OK or should I have found a raise or fold somewhere? Although calling down felt weak, the pot seemed too big to fold and SB seemed too happy to think K's was the best hand often enough to warrant a raise.

Party Poker 0.5/1 Hold'em (10 handed) converter

Preflop: Hero is MP1 with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">4 folds</font>, SB calls, <font color="#666666">1 fold</font>, UTG+1 calls.

Flop: (10 SB) T[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">UTG+1 raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">SB caps</font>, UTG+1 calls, Hero calls.

Turn: (11 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, UTG+1 calls, Hero calls.

River: (14 BB) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, UTG+1 calls, Hero calls.

Final Pot: 17 BB