NL200: K-high flush on 4-flush board against regular

[Jurrr]

Villain is 27/9/2.8 over 590 hands. Notes say:
- raises cbet without a set on low flop

I haven't really seen him out of line even though he is a bit laggy.

BB ($200)
UTG ($203.85)
Hero ($200)
UTG+2 ($136.15)
MP1 ($45.70)
MP2 ($103.55)
MP3 ($198)
CO ($278.25)
Button ($218.05)
SB ($304.85)

Preflop: Hero is UTG+1 with K[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/heart.gif[/img].
UTG calls $2, Hero calls $2, <font color="#666666">2 folds</font>, MP2 calls $2, <font color="#666666">3 folds</font>, <font color="#CC3333">SB raises to $13</font>, <font color="#666666">1 fold</font>, UTG calls $11, Hero calls $11, MP2 folds.

Flop: ($43) 9[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, UTG checks, <font color="#CC3333">Hero bets $30</font>, SB calls $30, UTG folds.

Turn: ($103) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $30</font>, Hero calls $30.

River: ($163) 3[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $30</font>, Hero...

Flop I feel ahead. Turn I feel WA/WB basically and figure worse hands don't call a raise except maybe Q[img]/images/graemlins/heart.gif[/img]Qx and that's not that many hands.

River feels like a blocking bet but is he reeling me in pretending weakness? Could he have A[img]/images/graemlins/heart.gif[/img]Ax or A[img]/images/graemlins/heart.gif[/img]Kx?

Is there value in raising here in terms of worse hands calling often enough and if so, how much to raise and what to do if he shoves?

P.S. Preflop is meh, but UTG was a big fish, everybody else had really low PFR% except for SB so I figured it will be OK.