trips facing a raise

Posted 7 years, 8 months ago

Blinds: $0.02/$0.05 (6 Players) BN: $7.43
SB: $12.54 (Hero)
BB: $5.39
UTG: $4.82
MP: $9.97
CO: $6.62

Preflop ($0.07) Hero is SB with T K

4 folds, Hero raises to $0.12, BB calls $0.07

Flop ($0.24) K K 6

Hero bets $0.11, BB raises to $0.40, Hero calls $0.29

his raise maybe consists any pp? or Kx?

Turn ($1.04) K K 6 7

Hero checks, BB bets $0.75, Hero calls $0.75

River ($2.54) K K 6 7 4

Hero checks, BB bets $3.00, Hero calls $3.00

it seemed that we have to fold the over bet there.
What is he raising us on flop ?
Do you fold river?