AK hits flop, did I extract as much as I could have?

[Yako]

Yeah, I think it sad that I have to ask such basic questions even though I've been playing 2/4 for about 15k hands now...

So villain is 41.18/0/0 after 17 hands.

Party Poker 2/4 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is Button with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Hero raises</font>, SB :#A500AF(Villain)/ calls, BB calls.

Flop: (6 SB) 3[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Villain bets</font>, BB folds, Hero calls.

Turn: (4 BB) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Villain bets</font>, Hero calls.

River: (6 BB) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, <font color="#CC3333">Hero bets</font>, Villain calls.

Final Pot: 8 BB

Now, did I use the right line here to extract as much as I could? For some reason, I thought he might be bluffing, so I decided to call the flop and turn bets and raise the river, because that's what wins me the most money when he is bluffing (Note, I do expect him to bluff the river too). But if he has a weaker king, what wins me the most money? Is it this same line? If it isn't, then it was the turn I was supposed to raise? So yeah, I'm a pretty lousy 2/4 player [img]/images/graemlins/wink.gif[/img]

Editted for the topic grammar [img]/images/graemlins/wink.gif[/img]