Flopped TPTK on monotone board

[Tokyo!!]

Villian is loose preflop, and likes to limp alot. He min-bets alot postflop, and made a weird raise with middle pair earlier when the board paired the top card on the turn. He's VPIP 54%,PFR 2% over 42 hands. I was pretty lost for most of this hand.

Party Poker Pot-Limit Hold'em, $ BB (6 max, 6 handed) FTR converter on zerodivide.cx

Hero ($96.05)
SB ($133.95)
BB ($48.50)
UTG ($87.56)
MP ($74.70)
CO ($88.40)

Preflop: Hero is Button with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.50.
UTG calls $1, 2 folds</font>, Hero raises to $4, 2 folds, UTG calls $3.

Flop: ($9.50) 2[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img] (2 players)
UTG checks, Hero bets $6, UTG raises to $12, Hero calls $6.

Turn: ($33.50) 2[img]/images/graemlins/heart.gif[/img] (2 players)
UTG bets $10, Hero calls $10.

River: ($53.50) 8[img]/images/graemlins/spade.gif[/img] (2 players)
UTG bets $20, Hero calls $20.

Final Pot: $93.50