AA weird action and bad river.

[NinaWilliams]

Villain open limped 45s UTG and seems bad and passive over a couple rounds.

Absolute Poker
Limit Holdem Ring game
Limit: $1/$2
6 players
Converter

Pre-flop: (6 players) Hero is UTG with A[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Hero raises</font>, UTG+1 calls, 2 folds, SB calls, BB calls.

Flop: 7[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/diamond.gif[/img] (8SB, 4 players)
<font color="#cc0000">SB bets</font>, BB folds, <font color="#cc0000">Hero raises</font>, UTG+1 folds, SB calls.

Turn: 8[img]/images/graemlins/heart.gif[/img] (6BB, 2 players)
<font color="#cc0000">SB bets</font>, Hero calls.

River: T[img]/images/graemlins/diamond.gif[/img] (8BB, 2 players)

Whats my plan if he
1) bets
2) checks

Also, how was my play up to the river?