Missed river value bet?

[chim17]

MP2 in the hand is perceived as a bad player. He has shown done second and third best hands repeatedly. He chases draws a lot, which is what worried me in this hand.

edit to add: He was extremely passive, never raised from what I saw, even when he had a monster.

Party Poker 5/10 Hold'em (9 handed)

Preflop: Hero is CO with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="666666">1 fold</font>, UTG+1 calls, <font color="666666">1 fold</font>, MP2 calls, <font color="666666">1 fold</font>, Hero raises, <font color="666666">2 folds</font>, BB calls, UTG+1 calls, MP2 calls.

Flop: (8.40 SB) T[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="blue">(4 players)</font>
BB checks, UTG+1 checks, MP2 checks, Hero bets, BB folds, UTG+1 calls, MP2 calls.

Turn: (5.70 BB) J[img]/images/graemlins/heart.gif[/img] <font color="blue">(3 players)</font>
UTG+1 checks, MP2 checks, Hero bets, UTG+1 folds, MP2 calls.

River: (7.70 BB) 6[img]/images/graemlins/club.gif[/img] <font color="blue">(2 players)</font>
MP2 checks, Hero checks.

Final Pot: 7.70 BB
<font color="green">Main Pot: 7.70 BB, between MP2 and Hero.</font> &gt; <font color="white">Pot won by Hero (7.70 BB).</font>

Results in white below: <font color="white">
MP2 shows 3s 3h (one pair, threes).
Hero shows Kd Kh (one pair, kings).
Outcome: Hero wins 7.70 BB. </font>