KK Deep- Villain's fold button appears to be broken

[criminaldave]

PokerStars No-Limit Hold'em, $2 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

Button ($200)
SB ($38)
BB ($271.75)
UTG ($191.30)
<font color="#C00000">MP ($493.85)</font>
<font color="#C00000">Hero ($474.25)</font>

Preflop: Hero is CO with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">UTG raises to $6</font>, MP calls $6, <font color="#CC3333">Hero raises to $26</font>, <font color="#666666">3 folds</font>, UTG calls $20, MP calls $20.

Flop: ($81) 9[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
UTG checks, MP checks, <font color="#CC3333">Hero bets $64</font>, UTG folds, <font color="#CC3333">MP raises to $218</font>, Hero ???

Villain is Bri-C. History-He may think I am generally a bit of a weak-tight player but with donk tendencies after turning 2 pair vs his overpair to stack him. He has since worked his stack up in a relatively short space of time. He is 26/18/2.4 over 800 hands. On the flop he has only folded to 30% of continuation bets and raises 40% of them. However, he has given the impression that he is a thinking LAG. What's my play on the flop?

I'm off to bed now but will check in with this in the morning.