Folding 2nd pair in blind battle?

[Rulle00]

Villian is 46/10 fishy player. Usually pretty weak, so when he shows strength I think he has a good hand.

25/50

Preflop: Everyone folds to sb who open raises, I call 53o.

Flop: 5 2 K rainbow Sb bets, I raise, sb 3 bets and I call.

Turn: 2 Sb bets, I?


I don't like folding any pairs in a blind fight, but I am fairly sure he has at least a King when he 3 bets flop. And I don't even have any 2 pair outs anymore. Can I fold?