[xLukex]

I would bet the turn since you hold the king of hearts. I would also be raising the river. BB is betting because he is aggressive. The stats say it all. UTG calling shows that you have a hand that beats his. You should definitely be raising the river here. UTG will call for an extra bet, as will LAGGY BB.

If you were raised on the turn then yeah, you should just call. But how can you just call on the river when you didn't bet the turn and your hand MASSIVELY improved? Someone thinks their pair of jacks is good.