[Harv72b]

Given that your opponent is basically unknown, but is looking LPA after a small hand sample, I play this the same. It's too likely that you're up against an aggressively played draw or a lower pair than your jacks for me to want to fold. And you don't really know your opponent well enough to even be thinking about a turn raise/river bet to attempt to fold out a weak K.

There's no real value in a river bet, as most opponents are folding most hands you beat and calling with most hands that beat you. Obviously this changes with a better read.