Folding Aces

To provide context, here's a hand I played against villain only a few moments before the hand below:

$0.5/$1 No Limit Holdem
8 players
Converted at weaktight.com


Stacks:

UTG		($126.75)
UTG+1		($119.00)
MP1		($101.85)
MP2		($100.00)
CO		($74.65)
Hero		($106.70)
SB		($13.00)
BB		($97.05)

Pre-flop: ($1.5, 8 players) Hero is BTN

2 folds, MP1 raises to $4, 2 folds, Hero calls $4, 2 folds

Flop: ($9.5, 2 players)
MP1 bets $6, Hero calls $6

Turn: ($21.5, 2 players)
MP1 checks, Hero bets $12, MP1 calls $12

River: ($45.5, 2 players)
MP1 checks, Hero checks

Final Pot: $45.50
Hero shows:
MP1 shows:

MP1 wins $43.3 ( won +$21.3 )
Hero lost -$22.00


Notice how conservative he is with an overpair. (Fooled me certainly.) I also have villain at 12.8/7.6. This all makes the following laydown easier:

$0.5/$1 No Limit Holdem
9 players
Converted at weaktight.com


Stacks:

UTG		($31.95)
Hero		($103.55)
MP1		($37.60)
MP2		($64.65)
MP3		($100.00)
CO		($102.35)
BTN		($17.00)
SB		($113.20)
BB		($100.00)

Pre-flop: ($1.5, 9 players) Hero is UTG+1

1 fold, Hero raises to $4, 5 folds, SB calls $3.5, 1 fold

Flop: ($9, 2 players)
SB bets $8.5, Hero calls $8.5

Turn: ($26, 2 players)
SB bets $18, Hero folds

Final Pot: $26

SB wins $42.75 ( won +$12.25 )
Hero lost -$12.50


I was immediately suspicious when he led out the flop, especially with a nearly pot size bet. I can't lay it down then, but when he's still firing away on the turn, it's time to let go. I think.