Villian, Vermin_74, has been very loose and somewhat aggressive(trying to lag, but not well). Probably 38/15/2.

***** Hand History for Game 4748187854 *****
$50 NL Texas Hold'em - Monday, July 17, 14:18:41 ET 2006
Table Table 108105 (Real Money)
Seat 4 is the button
Total number of players : 6
Seat 1: hallsPlus ( $108.51 )
Seat 2: awarun1 ( $59.40 )
Seat 4: sahilj ( $77.21 )
Seat 5: Hero ( $118.85 )
Seat 3: Vermin_74 ( $62.65 )
Seat 6: SNT51 ( $50 )
Hero posts small blind [$0.25].
SNT51 posts big blind [$0.50].
** Dealing down cards **
Dealt to Hero [ Tc Ah ]
hallsPlus folds.
awarun1 folds.
Vermin_74 raises [$1].
sahilj folds.
Hero calls [$0.75].
SNT51 calls [$0.50].
** Dealing Flop ** [ Ac, 5d, 6c ]
Hero bets [$2].
SNT51 folds.
Vermin_74 calls [$2].
** Dealing Turn ** [ 9d ]
Hero checks.
Vermin_74 bets [$2].
Hero raises [$8].
Vermin_74 raises [$12]. this raise signals I'm beat, right?
Hero calls [$6].
** Dealing River ** [ Ad ]
Hero checks.
Vermin_74 bets [$10].
Hero calls [$10].

I am sure you are going to say: "Just bet turn"
I was going to try to control the pot size, but I felt he was weak with $2 bet, so I raised it to a pot sized bet. I should fold to his min-reraise, yes? Do you call after A hits. I assume yes in case his two pair was counterfeited.