AA how to play? fold river?

[praios]

3/6 No-Limit Hold'em (6 handed)
Hand recorder used for this poker hand: Texas Grabem 1.8 by www.pokerstrategy.cc.

Preflop: Hero is BB with A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img]
MP2 folds, MP3 calls $6.00, 2 folds, SB calls $3.00, Hero raises to $36.00, MP3 calls $30.00, SB calls $30.00.

Flop: ($108.00) 8[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img] (3 players)
SB bets $80, Hero calls $80.00, MP3 folds.

Turn: ($268.00) 5[img]/images/graemlins/diamond.gif[/img] (2 players)
SB checks, Hero checks.

River: ($268.00) 8[img]/images/graemlins/diamond.gif[/img] (2 players)
SB bets $198, Hero calls $198.00.

Final Pot: $664.00

BaconBuster ist villian 20/16/3.2/19 realy aggro the straigh he would bet on the turn i think