NL 10 - KK... interesting spot (i think?). Who value bets this?

[Jw513]

Villain hasnt done anything out of line as of yet. No other reads.

Full Tilt No-Limit Hold'em, $0.10 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($24.15)
Hero ($10.85)
CO ($10)
Button ($10.10)
SB ($12.15)
BB ($21.55)

Preflop: Hero is MP with K, K.
UTG calls $0.10, Hero raises to $0.45</font>, 4 folds</font>, UTG calls $0.35.

Flop: ($1.05) 4, 3, 5 (2 players)</font>
UTG bets $1.05</font>, Hero raises to $3</font>, UTG calls $1.95.

Turn: ($7.05) 9 (2 players)</font>
UTG checks, Hero bets $4</font>, UTG calls $4.

River: ($15.05) 6 (2 players)</font>
UTG checks, Hero ????