[Harv72b]

SB might be playing scared with a set of jacks or deuces. Or he might be holding KJ and suddenly got scared that someone had KQ or a set on the turn. Or he might have decided to get tricky with QT & a flopped OESD. Lots of possibilities at this point, and with the size of the pot, there's no way you should folding. As for your "LAP...could be a LAG", there's no way to say what he's holding. Maybe KT. Maybe KJ. Maybe AK, maybe 72o. Maybe KK; your read just isn't specific enough to narrow it down.

I'm planning to see a showdown here, although I might could be persuaded to fold for 2 bets UI on the river.