River play. How much do I suck?

No reads on either villian or the guy who went all-in. I use that as my defense for my river play.

Party Poker 2/4 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is CO with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#666666">1 fold</font>, UTG+2 calls, <font color="#666666">2 folds</font>, MP3 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, BB calls, UTG calls, UTG+2 calls, MP3 calls.

Flop: (10.50 SB) J[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">BB bets</font>, UTG calls, UTG+2 calls, MP3 calls, Hero calls.

Turn: (7.75 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">BB bets</font>, UTG calls $4 (All-In), UTG+2 calls, MP3 folds, <font color="#CC3333">Hero raises</font>, BB calls, UTG+2 folds.

River: (13.75 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players, 1 all-in)</font>
<font color="#CC3333">BB bets</font>, Hero calls.

Final Pot: 15.75 BB

With reads I would be more tempted to raise. But with an all-in already, i figured it would be safer to be weak tight and call.

Also, how bad is the flop? I felt the board was pretty draw heavy and with all the callers, raising would only bloat the pot. And thats bad right?