NL100 Value-betting TPTK

[Lordy]

Villain is 36/0/0.7, wtsd 35% over 100 hands.

Party Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 5 Players - (LegoPoker HH Converter)

SB: $136.93
BB: $100.00
Hero (UTG): $103.50
CO: $96.50
BTN: $80.91

Preflop: Hero is dealt A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img] (5 Players)
<font color="red">Hero raises to $4.00</font>, CO calls $4.00, 3 folds

Flop: ($9.50) T[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $7.00</font>, CO calls $7.00

Turn: ($23.50) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $14.00</font>, CO calls $14.00

River: ($51.50) A[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero ?

He's probably not value-betting worse or bluffing hearts, but might call another bet with Kx or A[img]/images/graemlins/heart.gif[/img]X[img]/images/graemlins/heart.gif[/img]. Is this an obvious value-bet ?