PLO8 $100: Checking the turn?

[MattS]

Villain has the following PT-stats: 61.7/3.7/1.17

Party Poker
Pot Limit Omaha Ring game
Blinds: $0.50/$1
10 players
Converter

Stack sizes:
UTG: $174.41
UTG+1: $243.17
UTG+2: $32.04
MattS: $122.57
MP2: $92.13
MP3: $76.05
CO: $78.27
Button: $99
SB: $102
BB: $99.45

Pre-flop: (10 players) MattS is MP1 with 2[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/diamond.gif[/img]
UTG calls, UTG+1 folds, UTG+2 calls, <font color="#cc0000">MattS raises to $5.5</font>, 2 folds, CO calls, 3 folds, UTG calls, UTG+2 folds.

Flop: 3[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] ($19, 3 players)
UTG checks, <font color="#cc0000">MattS bets $18.05</font>, CO calls, UTG folds.

Turn: K[img]/images/graemlins/diamond.gif[/img] ($55.1, 2 players)
<font color="#cc0000">MattS bets $52.35</font>, CO calls.

River: 2[img]/images/graemlins/heart.gif[/img] ($159.8, 2 players)
<font color="#cc0000">MattS raises all-in $46.67</font>, <font color="#cc0000">CO calls all-in $2.37</font>.