NL$200 against a nit. C/bet was called. Turned MPTK. Best line?

[StarRain]

I only have 44 hands on this villain so it isn't really reliable. His stats was rediculous (11.2/2.3). My image was maniac/lag so it was pretty likely I was floated on the flop. I called on turn because I didn't notice his Flop Seen % was so low. Since the river was considered a blank (yes?), I think I have to call that river even though I might not call the turn bet if I have noticed it earlier. Advices on turn and river please

PokerStars No-Limit Hold'em, $2 BB (5 handed) pokerhand.org hand converter

Button ($108.95)
SB ($207.30)
BB ($205.20)
UTG ($34.80)
Hero ($375.20)

Preflop: Hero is MP with A[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
UTG calls $2, <font color="#CC3333">Hero raises to $12</font>, Button calls $12, <font color="#666666">2 folds</font>, UTG folds.

Flop: ($29) K[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $18</font>, Button calls $18.

Turn: ($65) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $26</font>, Hero calls $26.

River: ($117) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $52.95 (All-In)</font>, Hero?