KK hu, with no A on board

[Wynton]

4 players. I have KK in BB. No read on the villain.

Co raises. I reraise. Co calls. HU on flop.

Flop is 3 [img]/images/graemlins/heart.gif[/img] J [img]/images/graemlins/spade.gif[/img] 8 [img]/images/graemlins/spade.gif[/img]

I bet. Villain raises. I just call. Mistake?

Turn is 5 [img]/images/graemlins/heart.gif[/img]

I check. Villain bets. I c/r. Villain calls.

River is Q [img]/images/graemlins/diamond.gif[/img]

I bet. Villain raises. I ??