not happy about making trips on the river

[Fly]

Villain is a donkey. He has called down 3 streets light (OOP) several times (once w/ A5 on a QJ7AK) board. One time as pfr, he pot, pot, 1/2 pot river and folded to a shove (effectively a minraise). Earlier he flopped trips vs me and c/c flop, c/c turn, and c/c river when a flush hit (before I saw him call down light vs others obv).

Full Tilt Poker - No Limit Hold'em Cash Game - $0.75/$1.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $294.75
BB: $333.25
UTG: $324.85
MP: $383.35
CO: $111.75
Hero (BTN): $689.45

Preflop: Hero is dealt T[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img] (6 Players)
UTG folds, <font color="red">MP raises to $6.00</font>, CO calls $6.00, Hero calls $6.00, 2 folds

Flop: ($20.25) 4[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/heart.gif[/img] (3 Players)
<font color="red">MP bets $20.25</font>, CO folds, Hero calls $20.25

Turn: ($60.75) 2[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">MP bets $60.75</font>, Hero calls $60.75

River: ($182.25) K[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">MP bets $182.25</font>, Hero?