KK meets AA flop. Turn decision

[Magior]

Long time lurker, first time poster

Cryptologic £3/£6

BB sat down an orbit ago, has seemed loose preflop, no other reads.
CO is 65/17/1 over 60ish hands. He likes to limp-reraise his good hands and check/call flop, check-raise the turn with his monsters.

I get dealt K[img]/images/graemlins/spade.gif[/img]K[img]/images/graemlins/club.gif[/img] on the button.


Preflop
2 fold, CO calls, Hero raises, SB folds, BB calls, CO raises, Hero caps, BB calls, CO calls

Flop A[img]/images/graemlins/spade.gif[/img]A[img]/images/graemlins/heart.gif[/img]7[img]/images/graemlins/spade.gif[/img]
BB bets, CO calls, Hero raises, both call

Turn 6[img]/images/graemlins/heart.gif[/img]
BB donks again, CO calls, [b]Hero calls