Not sure how to react on donk bets.

BB might have SD or set, trying to build the pot with the fish in. Maybe call and re-evaluate turn.

you can not fold or raise here on flop. A call would be only option

easy call

Iso raise bigger preflop.
On flop you can call and see what the turn will bring.

Hmm, Thanks. Here's how the hand looks like:

PokerStars - $0.02 NL - Holdem - 6 players
Hand converted by PokerTracker 4

UTG: 80 BB (VPIP: 21.25, PFR: 2.50, 3Bet Preflop: 0.00, Hands: 160)
MP: 43 BB (VPIP: 100.00, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 2)
CO: 80 BB
Hero (BTN): 103 BB
SB: 104 BB (VPIP: 14.60, PFR: 5.18, 3Bet Preflop: 2.10, Hands: 1,959)
BB: 100 BB

SB posts SB 0.5 BB, BB posts BB 1 BB, UTG posts penalty blind 1 BB, CO posts penalty blind 1 BB

Pre Flop: (pot: 3.5 BB) Hero has K♥ J♣

UTG checks, MP calls 1 BB, CO checks, Hero raises to 6 BB, fold, BB calls 5 BB, fold, MP calls 5 BB, fold

Flop: (20.5 BB, 3 players) 8♠ K♣ 7♦
BB bets 10 BB, MP calls 10 BB, Hero calls 10 BB

Turn: (50.5 BB, 3 players) 4♣
BB bets 34 BB, fold, fold,

So my plan is to call flop and fold if he bet another good size bet OTT. What range do you think he has just OTF, and also OTT?

Nitrol, like how much? I'm doing a 3+1bb per limper..

Lol, my mistake, I thought you opened for $0.06 and it was 6BB which is fine...

BB donks flop and turn because he has something. Can he do this with weaker Kx, BDFD on flop which turned FD on turn?