Villain is 5knl HU aggro reg. Limper is VPIP 100 passive whale.

Hero ($642.86)
SB ($550.70)
BB ($596.66)
UTG ($149.80)
MP ($506.96)
CO ($471.52)

Preflop Hero has J 4
UTG calls $4, 2 folds, Hero calls $4, SB raises to $20, 1 fold, UTG calls $16, Hero calls $16

Flop: ($64) (3 players) T 9 4
SB bets $40, 1 fold, Hero calls $40

Turn: ($144) (2 players) T 9 4 5
SB bets $108, Hero?