I open Q9
in MP and the button three bets and the big blind calls.
Button is a bit of a lagfish in that he plays too many hands pre and continuation bets too often, but he isn't awful. I don't expect that he is three betting me too light here.
Flop is Q
9
4
Checks to button who bets, BB calls, I raise, button 3s, BB folds, I cap.
Turn is A
Nut worst card in the deck and I'm torn between check/call and bet/call?