[Mossberg]

flop bet size is fine imo.

I could go either way on the river depending on reads/flow -- it would really help to have an idea of how light he is calling 3bets with position. Also, can he vbet this river with QQ? Without a read, I think it's probably best to just let it go. If you have any reason to believe that he could be "value"betting less than QQ, or turning a weak made hand into a bluff, then it obviously shifts over to a call. TBH though, his river bet-sizing doesn't look at all like a made hand turning into a bluff.

If you don't have a good enough feel for how this guy plays, then I don't think you should be 3betting this preflop in the first place.