2/4 KK faces a tough flop decision

[ryanghall]

Normally, I'd raise this flop but this was a tough call because of the players involved.

I don't have many hands on BB but he seems reasonable.
UTG+1 is tight, as in 14/5/1.2 nitty tight. I have no problem at all getting all-in w/ the BB shortstack but I'm a little worried about UTG+1.

Should I raise this flop anyway? Call, use my position and see what happens like I did? Bet turn?

PokerStars No-Limit Hold'em, $4 BB (9 handed) FTR converter on zerodivide.cx

Button ($392)
SB ($206.40)
BB ($151.25)
UTG ($362.15)
UTG+1 ($400)
MP1 ($521.40)
Hero ($631.60)
MP3 ($323.95)
CO ($172)

Preflop: Hero is MP2 with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls $4, MP1 calls $4, <font color="#CC3333">Hero raises to $20</font>, <font color="#666666">4 folds</font>, BB calls $16, UTG+1 calls $16, MP1 calls $16.

Flop: ($82) 6[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets $32</font>, UTG+1 calls $32, MP1 folds, Hero calls $32.

Turn: ($178) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, UTG+1 checks, Hero checks.

River: ($178) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets $40</font>, UTG+1 folds, Hero calls $40.

Final Pot: $258