Hmm.. raise the turn harder......

On the river, there are trips on the board.. you aren't afraid of losing to a flush. royal flush > straight flush > 4OK > full house > flush > straight > 3OK > 2 pair > 1 pair > high card.

I don't think checking behind on the river is AS bad of a play here as some make it out to be. It is a little weak though. I'd bet it.

HOWEVER:
QQ loses to 88, 44, KK, AA, and 2x.

It's honestly not that bad of a check considering the size of the stacks.. nearly 200BB for each.