.25/.50 river call ?
 

how do you play that hand ? and do you make the river call ?

PokerStars No-Limit Hold'em, $0.50 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB ($49.50)
BB ($69.05)
UTG ($42.30)
UTG+1 ($28.85)
MP1 ($65.90)
MP2 ($25.75)
Hero ($51.40)
Button ($21.75)

Preflop: Hero is CO with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls $0.50, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $2.5</font>, Button calls $2.50, <font color="#666666">2 folds</font>, UTG+1 folds.

Flop: ($6.25) 8[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $3.5</font>, Button calls $3.50.

Turn: ($13.25) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

River: ($13.25) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $10</font>, Hero folds.

Final Pot: $23.25

Re: .25/.50 river call ?
 

Bet more on the flop. As played its possible villain got counterfeited and is making a desperation bluff but you cant call this without a read.