Q-Q in SB with rag flop

[bfc]

I would have raised more pre-flop. You're giving villain slightly better than 2:1 to call so he's going to call with a wide range of hands hoping to outflop you.

I think the flop bet is fine and the decision on the turn is very difficult. If I were the villain I could possibly call your bet with nothing hoping to take it away from you if you checked the turn. I would put you on AK, JJ-AA and could reasonably expect to take the pot away from you if you were making a continuation bet with AK or if another diamond came on the turn. If I had any outs to beat an overpair (e.g., a flush draw or even a gutshot) then I probably call your flop bet (depending on the read I had on you).

Although villain calling your flop bet may well indicate you are behind, I still think there's a fair chance you are ahead. By checking the turn (and then folding to villain's bet) you are essentially giving up a $96 pot for the cost of a $44 bet. I can't do the exact math on how often you need to be ahead on the turn to make pushing the correct play but my intuition is that it only needs to be around 30%.