Too weak? Nutflush @ 100NL 6max

[Jehi]

Lately I've been wondering if I'm missing value with these hands. Villain just sat down, notes from last sessions says he's reraising at least with AJ,AQ etc preflop on the button and stats vpip 19%, PFR 12%, AF 3,6. When the flush came I was puzzled with minreraise because I was holding the A[img]/images/graemlins/spade.gif[/img] so he definately didn't reraise me with AQ type of hand. So I decided to call it down. Thoughts?

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

MP ($35.40)
CO ($105.10)
Button ($99.15)
SB ($149.84)
BB ($18.50)
Hero ($105.20)

Preflop: Hero is UTG with A[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/spade.gif[/img]. SB posts a blind of $0.50.
<font color="#CC3333">Hero raises to $4</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Button raises to $12</font>, <font color="#666666">2 folds</font>, Hero calls $8.

Flop: ($25.50) 8[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

Turn: ($25.50) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $20</font>, <font color="#CC3333">Button raises to $40</font>, Hero calls $20.

River: ($105.50) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero ??
Final Pot: $105.50