Easy value bet?

[Turkish]

Villian in hand is a complete unknown..Party 2/4

Preflop: Hero is Button with Q[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
UTG folds, UTG+1 calls, MP1 folds, MP2 folds, MP3 folds, CO folds, <font color="#CC3333">Hero raises</font>, SB calls, BB calls, UTG+1 calls.

Flop: (8 SB) K[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, BB checks, <font color="#CC3333">UTG+1 bets</font>, <font color="#CC3333">Hero raises</font>, SB folds, BB folds, UTG+1 calls.

Turn: (6 BB) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, UTG+1 calls.

River: (8 BB) K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks. Hero ?