KK against maniac

[losingdonkey]

guy was 85/30/3 over 50 hands or so. Whats my turn play here? Should I shove/fold? if I call and the river bricks whats my play?

Poker Stars - No Limit Hold'em Cash Game - $0.02/$0.05 Blinds - 4 Players - (LegoPoker (http://www.legopoker.com) Hand History Converter (http://www.legopoker.com/hh))

hero (SB): $12.43
BB: $10.00
UTG: $19.56
BTN: $3.06

Preflop: hero is dealt K/images/graemlins/spade.gif K/images/graemlins/heart.gif (4 Players)
<font color="red">UTG raises to $0.20</font>, BTN folds, <font color="red">hero raises to $0.65</font>, BB folds, UTG calls $0.45

Flop: ($1.35) 4/images/graemlins/spade.gif 5/images/graemlins/heart.gif Q/images/graemlins/club.gif (2 Players)
<font color="red">hero bets $0.80</font>, UTG calls $0.80

Turn: ($2.95) 9/images/graemlins/club.gif (2 Players)
<font color="red">hero bets $2.00</font>, <font color="red">UTG raises to $4.10</font>, hero calls $2.10

River: ($11.15) A/images/graemlins/heart.gif (2 Players)
hero checks, <font color="red">UTG bets $6.88

[orange]

the ace shouldnt have changed much (other than AQ). i probably shove the turn and feel pretty good about it. as played, i call usually vs. this guy.