100NL - SB special filled up on river

[Sparta45]

No real read on villain. He's 30 and 0 over only 23 hands.
Should I re-raise on the river for value, or just call? Should I play for stacks here?

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG+1 ($142)
MP1 ($58.50)
MP2 ($18.50)
MP3 ($80.90)
CO ($44.25)
Button ($14.35)
Hero ($205.40)
BB ($115.10)
UTG ($25.40)

Preflop: Hero is SB with 5[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls $1, MP1 calls $1, <font color="#666666">4 folds</font>, Hero completes, BB checks.

Flop: ($4) K[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, BB checks, UTG+1 checks, MP1 checks.

Turn: ($4) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets $3</font>, BB folds, UTG+1 calls $3, MP1 folds.

River: ($10) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $6</font>, <font color="#CC3333">UTG+1 raises to $23</font>, <font color="#CC3333">Hero ?

[SABR42]

Re-raise versus his flush.

[RyanCMU]

Not reraising is a crime.

[Kos13]

Bet more on the river, and 3bet this 100% of the time.

[mce86]

Even though I got killed on a hand like this recently live....imagine raising the river and villian shoves, call and flips over a6, im still raising here...only hands we really fear are a6 and k6...and the way its been played, it also looks like a flush that got there.

[MINETZ]

hes gonna have a flush here a lot more than hes gonna have limped kk/aa so 3 bet the river.