The check behind on the turn was a damn mis-click. However, villain's play doesn't really make a whole lot of sense. He's 31/13/3 over 50 hands and has been fairly aggressive post-flop in some spots. Not a real interesting hand, but does anyone not snap call here?

PokerStars No-Limit Hold'em, $0.10 BB (7 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (Button) ($10.25)
SB ($4.55)
BB ($2)
UTG ($11.95)
MP1 ($6.25)
MP2 ($13.10)
CO ($12.05)

Preflop: Hero is Button with K, A
4 folds, Hero bets $0.40, SB calls $0.35, 1 fold

Flop: ($0.90) 2, 7, 2 (2 players)
SB checks, Hero bets $0.80, SB calls $0.80

Turn: ($2.50) K (2 players)
SB checks, Hero checks

River: ($2.50) J (2 players)
SB bets $3.35 (All-In), Hero calls $3.35

Total pot: $9.20 | Rake: $0.45