Learning poker again 2/3 KK out of position, double paired board

[Frogic]

MP2 in this hand is a very passive 50/0/0.19 after 30ish hands, loves to call down with any draw or piece of the board, Often folding on the turn/river after putting many bets in.

Party Poker 2/4 Hold'em (9 handed) converter

Preflop: Hero is SB with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">UTG raises</font>, <font color="#666666">2 folds</font>, MP2 calls, MP3 calls, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">1 fold</font>, UTG calls, MP2 calls, MP3 calls.

Couldn't be more standard, I'm ahead I love my equity... hoping for my none ace flop.
Flop: (13 SB) 6[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, UTG folds, MP2 calls, MP3 calls.

Looking good so far, now anyone without a 7 or ace is practically drawing dead to me.

Turn: (8 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, MP2 calls, MP3 folds.

Hmm, two paired board but its the calling station so I'm betting and folding to a raise.
River: (10 BB) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP2 bets</font>, Hero calls.

I really don't like my river play here, it feels like that I should have bet/folded given the opponent, since its hard to induce a bluff here and given that I checked I think arguments can be made for folding the river.
Final Pot: 12

Thoughts?

[Hybrid_11]

I bet the river with the intention of calling a raise.

[brettbrettr]

The fact that you checked should make you *more* inclined to call his river bet.

[Frogic]

I understand the idea, but a 0.19 aggression factor is like the passive of the passives. How often is someone like that bluffing a river? Like I couldn't live with myself if I folded, but I doubt its that large of an error to fold(if it is one)

Frogic

[Hybrid_11]

The pot is lying you 11 to 1 once MP bets the river. You only have to win this pot less then 10% of the time for a call to be correct.

[Bascule]

[ QUOTE ]
I understand the idea, but a 0.19 aggression factor is like the passive of the passives.

[/ QUOTE ]

This read is only based on 30 hands. After some bad decisions, I'm now wary of overinterpreting PT data based on small numbers of hands, as in this case.