I don't think much has changed on the turn. That deuce is hardly a scare card: he 3-bet with A-2? 33 is also very unlikely. The only plausible 3-bet hand that's beating you is AA (or KK, but that would just suck).

Hero 3-bets the turn. A cap would make me nervous enough to call down on the river, but otherwise I'm expecting to win when SB turns over JJ or QQ.