400NL QJ toppair river decision

[Toretto]

Party Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 5 Players - (LegoPoker Hand History Converter)

SB: $127.40
BB: $398.15
UTG: $86.60
Hero (CO): $507.40
BTN: $461.20

Preflop: Hero is dealt Q[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/club.gif[/img] (5 Players)
UTG folds, <font color="red">Hero raises to $16.00</font>, BTN calls $16.00, 2 folds

Flop: ($38) 4[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">Hero bets $26.00</font>, BTN calls $26.00

Turn: ($90) Q[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $65.00</font>, BTN calls $65.00

River: ($220) 9[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, <font color="red">BTN bets $176.00</font>, Hero calls $176.00

Pot Size: $572.00 ($2.50 Rake)

no reads on villain at that point, later he had 65/25 after 20 hands
i really couldnt find any hand that makes sense he plays that way besides 77,87, 99-JJ, i really didnt want to see 99 obv, but i just thought well then it should be so
sometimes i think he will play 67 that way, but i thought it would be more likely that he raises the turn
do you fold vs this big river bet vs unknown villain?