FW 20. A bad white LAG in a suit (who is one of the worst players in the game, if not the single worst) raises in the HJ or so. It's folded to me and I 3bet K

Q

in the BB. He calls.
Flop J

J

T

. I bet, he raises, I call.
Turn 9

. I check, he bets, I raise, he calls quickly.
River 8

. I bet and he confidently raises. I call or 3bet?