How do you maximize this hand.

[MJL]

Live the usual loose passive $5/$10. I am seen by all as tight and aggressive and have shown down quality 90% of the time. The observant ones will slow down or fold if I start betting. There are a couple who will call with the smallest hope of a hand.

I'm BB with two black 9s. 6 to the flop no raise. Flop is a miracle. 99T. I check and it's checked to button who bets, we all call. The button could have bet due to position or a real hand.

I wonder if I should check the turn then over call if its the button who bets or lead to get more in the pot and raise if the button bets. Maybe lead and call the button bet to get more overcallers. My delema is I get the feeling it may get checked around if I check again.
We now have 6 players and 6BB.
Turn is a Q. Two hearts on the board. Who would call if I bet? Anyone with a T,Q,straight draw, flush draw. Would the Q slow down the button so he won't bet?

Small blind checks I....?