Backing off with KK

[Coilean]

Another 40-80 hand at the Commerce, fairly aggressive table. I open raise from MP with K[img]/images/graemlins/spade.gif[/img]K[img]/images/graemlins/diamond.gif[/img], the button calls, a reasonably tough and aggressive BB reraises, I cap, and they both call.

The flop comes Q[img]/images/graemlins/spade.gif[/img]T[img]/images/graemlins/spade.gif[/img]8[img]/images/graemlins/spade.gif[/img]. BB bets, I raise, button calls, BB reraises, I cap, and they both call.

The turn brings the 6[img]/images/graemlins/club.gif[/img], and the BB bets. Call or raise? I called, and the button also called.

The river is the 7[img]/images/graemlins/club.gif[/img], and the BB checks. Bet or check? I checked.