TP Turns Top2, Scare Board. Max u will call on River?

[stinkpaw]

No reads. What is the max yo will call on the River, if anything.

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Poker Stars Converter Tool from http://www.flopturnriver.comFlopTurnRiver.com (Format: Plain Text)

UTG+1 ($57.10)
MP1 ($99.30)
MP2 ($92.65)
MP3 ($99.50)
Hero ($171.40)
BTN ($109.80)
SB ($148.55)
BB ($63.10)
UTG ($89.65)

Preflop: Hero is CO with Kd, Qd.
5 folds, Hero raises to $4, BTN calls $4, 2 folds.

Flop: ($9.50) 8c, 9c, Qs (2 players)
Hero checks, BTN bets $6, Hero calls $6.

Turn: ($21.50) Kc (2 players)
Hero checks, BTN bets $15, Hero calls $15.

River: ($51.50) 3s (2 players)
Hero checks, BTN bets $26, Hero ???.