villain is a decent-good reg

ten minutes ago i bet/check/bet a 779xA board that rivered
a 3flush and he checkcalled with TT.

Plan for turn?

PokerStars No-Limit Hold'em, $1.00 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP2 ($176.90)
CO ($102.50)
Button ($33)
SB ($128.40)
Hero (BB) ($154.65)
UTG ($101)
UTG+1 ($106.65)
MP1 ($100)

Preflop: Hero is BB with A, J
4 folds, CO bets $3, 2 folds, Hero calls $2

Flop: ($6.50) J, 6, K (2 players)
Hero checks, CO bets $4, Hero raises to $12, CO calls $8

Turn: ($30.50) K (2 players)
Hero?