[polarbear]

20-40 hold em. 3.5 per flop. Raises about 65-70 preflop. I have QcJc in MP and limp.

If you're not likely to get more than one more limper, why limp? This looks like a raise or fold hand.

You flop the nuts with a redraw, and slowplay the flop with great success, trapping 3 players for 4 bets each.

Now the turn is a blank. There's a bettor and a caller to you. You're thinking about not raising with the nuts because the button might 3-bet? What would be bad about that? You would get to 4-bet the turn, and you don't lose the bets from the SB and BB if they fold.

Getting reraised when you have the nuts isn't bad. It's good, assuming the other guy doesn't have the nuts as well. If the button has the nuts too, you can't win much regardless of whether you call or raise if the flush doesn't come in. You'll only win half of what the SB and BB put in on the turn and river. The chances that he actually has the nuts are slim too.