Abs 3/6 AKs in BB turn/river help

[foureightsuited]

Villain in this hand is 42/12/.5 over 96 hands in my limited absolute database. I am a little confused on the turn and river lines here against this fairly passibe opponent. Could be basic, just running bad so I thought I would check.

Absolute Poker
Limit Holdem Ring game
Limit: $3/$6
9 players
Converter

Pre-flop: (9 players) Hero is SB with K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/heart.gif[/img]
7 folds, <font color="#cc0000">Hero raises</font>, <font color="#cc0000">BB 3-bets</font>, <font color="#cc0000">Hero caps</font>, BB calls.

Flop: 5[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] (8SB, 2 players)
<font color="#cc0000">Hero bets</font>, BB calls.

Turn: J[img]/images/graemlins/diamond.gif[/img] (5BB, 2 players)
<font color="#cc0000">Hero bets</font>, <font color="#cc0000">BB raises</font>, Hero calls <font color="aaaaaa">(8:1)</font>.

River: K[img]/images/graemlins/spade.gif[/img] (9BB, 2 players)
<font color="#cc0000">Hero bets</font>, <font color="#cc0000">BB raises</font>, Hero calls <font color="aaaaaa">(12:1)</font>.

Results:
Final pot: 13BB