Limp pot Dobles parejas vs donk turn y river de reg

PokerStars - €0.05 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

CO: 31.8 BB (VPIP: 27.27, PFR: 7.58, 3Bet Preflop: 0.00, Hands: 205)
BTN: 77.2 BB (VPIP: 6.67, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 15)
SB: 111.4 BB (VPIP: 20.01, PFR: 15.09, 3Bet Preflop: 3.49, Hands: 2,310)
Hero (BB): 140.4 BB
UTG: 41 BB (VPIP: 23.61, PFR: 20.96, 3Bet Preflop: 7.06, Hands: 1,646)
MP: 85.4 BB (VPIP: 26.32, PFR: 12.05, 3Bet Preflop: 4.17, Hands: 488)

SB posts SB 0.4 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.4 BB) Hero has 8:spade: K:heart:

fold, MP calls 1 BB, fold, BTN calls 1 BB, SB calls 0.6 BB, Hero checks

Flop: (4 BB, 4 players) 5:heart: 8:heart: A:diamond:
SB checks, Hero checks, MP checks, BTN bets 1.8 BB, SB calls 1.8 BB, Hero calls 1.8 BB, MP calls 1.8 BB

Turn: (11.2 BB, 4 players) K:spade:
SB bets 8.8 BB, Hero calls 8.8 BB, fold, BTN calls 8.8 BB

River: (37.6 BB, 3 players) T:diamond:
SB bets 40 BB, HERO????


SB que es el que sale donkeando turn es regular y de los buenos, en 2,3k manos tiene 67 WSD y 47 WWSF.

Debería subir en turn? Es que puede tener set o dobles mejores... en river que hago??