KK with overcard, flush draw and paired board...bet the turn?

[TripleH68]

PokerStars: Hold'em Limit ($3/$6)
TripleH has K [img]/images/graemlins/heart.gif[/img]K [img]/images/graemlins/diamond.gif[/img] in MP2.
BB is on a short stack and has been quiet.
Other players are passive/quick to fold to aggression.
(I find the best games.)

UTG calls,UTG+1 calls,2folds,TripleH68 raises,3folds,SB folds,BB calls,UTG calls,UTG+1 calls.

*** FLOP *** [A [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/club.gif[/img] 4 [img]/images/graemlins/club.gif[/img]]
BB checks,UTG checks,UTG+1 checks,TripleH68 bets,BB calls,2folds.
*** TURN *** [A [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/club.gif[/img] 4 [img]/images/graemlins/club.gif[/img]] [7 [img]/images/graemlins/heart.gif[/img]]
BB checks,TripleH68 ???