Had an interesting conversation about this hand. What do we think would be the best line/sizing on the turn? And on the river, do we bet? How much?

MP2 is a megafish and we're ahead of him 90-98% of the time. CO is a tight somewhat nitty reg.

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

Hero (Button) ($186.10)
SB ($17.50)
BB ($18.50)
UTG ($100)
UTG+1 ($32.75)
MP1 ($24.65)
MP2 ($31.10)
CO ($105.10)

Preflop: Hero is Button with K, J
3 folds, MP2 calls $1, CO calls $1, Hero bets $5, 2 folds, MP2 calls $4, CO calls $4

Flop: ($16.50) 2, 4, 3 (3 players)
MP2 checks, CO checks, Hero checks

Turn: ($16.50) K (3 players)
MP2 bets $6, CO calls $6, Hero raises $16, MP2 calls $10, CO calls $10

River: ($64.50) 9 (3 players)
MP2 checks, CO checks, Hero