River Donk Top Pair Decent Kicker

[Langerz]

Villian is new, haven't noticed her in a hand yet. Flop and turn I kept betting waiting for her to tell me if I wasn't ahead. The river donk froze me up.

Ultimate Bet 1/2 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is MP1 with J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img].
UTG calls, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">6 folds</font>, UTG calls.

Flop: (5.50 SB) 5[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font>, UTG calls.

Turn: (3.75 BB) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font>, UTG calls.

River: (5.75 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets</font>, Hero ???