50NL river bluff, yay or nay?

[STARSCREAM.]

I've been playing a regular ole 18/16/4 TAG game, villian seemed like a typical 50NL weakpassivedonk. Who bets this river here? Who bets it but bets less, or maybe even more?

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

CO: $59.25
BTN: $63.50
SB: $59.65
BB: $50
Hero (UTG): $50

Pre-Flop: 3[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] dealt to Hero (UTG)
<font color="red">Hero raises to $2</font>, CO folds, BTN calls $2, 2 folds

Flop: ($4.75) 4[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $3.50</font>, BTN calls $3.50

Turn: ($11.75) K[img]/images/graemlins/club.gif[/img] (2 Players)
Hero checks, BTN checks

River: ($11.75) T[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero bets $11.75</font>