I only had a couple of hands on the villain. In this situation what would you recommend? Let him know where we stand or let him keep bluffing (and potentially improve ourselves)?

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($101.65)
BB ($9.25)
UTG ($288.85)
MP ($62.95)
Hero ($98.50)
Button ($108)

Preflop: Hero is CO with J, K.
UTG raises to $7, 1 fold, Hero calls $7, 3 folds.

Flop: ($15.50) 6, 6, 2 (2 players)
UTG bets $6, Hero calls $6.

Turn: ($27.50) J (2 players)
UTG bets $10, Hero raises to $30