This hand confused me a little. Villain had only been at the table for 8 hands. So far though he'd played some pots calling pre flop raises 3 times probably somewhat lightly both in and out of position.

Thought he was repping a very small range here, but also this isn't a common bluff line at 20NL at all in my experience.

Party Poker No-Limit Hold'em, $0.20 BB (6 handed) - Party-Poker Converter Tool from FlopTurnRiver.com

SB ($7.98)
BB ($3.42)
UTG ($20.98)
MP ($4.50)
Hero (CO) ($22.04)
Button ($22.05)

Preflop: Hero is CO with A, J
2 folds, Hero bets $0.70, Button calls $0.70, 2 folds

Flop: ($1.70) A, 5, 9 (2 players)
Hero bets $1.20, Button raises $2.40, Hero calls $1.20

Turn: ($6.50) 5 (2 players)
Hero checks, Button bets $6.50, Hero calls $6.50

River: ($19.50) Q (2 players)
Hero checks, Button bets $9.75

Total pot: $19.50