888 Poker - $0.02 NL (6 max) - Holdem - 3 players

BB: 59.5 BB (VPIP: 55.56, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 10)
BTN: 50 BB (VPIP: 19.57, PFR: 13.04, 3Bet Preflop: 4.76, Hands: 142)
Hero (SB): 88 BB

Hero posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has Kc As

fold, Hero raises to 4 BB, BB calls 3 BB

Flop : (8 BB, 2 players) 7h 9h Kh

Hero bets 4 BB, BB calls 4 BB

Turn : (16 BB, 2 players) 7d

Hero bets 8 BB, BB calls 8 BB

River : (32 BB, 2 players) 3h

Hero bets 10 BB, BB raises to 43.5 BB and is all-in, fold

BB wins 49 BB

What do I do in situations like these? check/fold all the streets?