50nl - Nittish Villian takes an odd line

[whyzze]

I guess he is more just your average donk than nit.

No reads other than PT. Villian is 30.4/4.2/2.11

I dont 3bet because his PFR is so low and I want to keep the pot small. His check behind on the flop made me a little suspicious of JJ. So I was thinking JJ/AK/AQ were his range.

What do you think about the river?

Blinds - 6 Players - (LegoPoker HH Converter)

Hero (SB): $60.95
BB: $27.40
UTG: $50.00
MP: $15.30
CO: $51.40
BTN: $62.05

Preflop: Hero is dealt K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img] (6 Players)
3 folds, <font color="red">BTN raises to $2.00</font>, Hero calls $1.75, BB folds

Flop: ($4.50) 8[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, BTN checks

Turn: ($4.50) A[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $2.50</font>, BTN calls $2.50

River: ($9.50) 9[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero bets $5.50</font>, <font color="red">BTN raises to $21.00</font>, hero????

Pot Size: $20.50 ($1 Rake)