TT on undercard board facing ai turn

[avisco01]

Villain is an unknown, no read as I haven't been at the table very long. Not sure what I should do on the turn. Any help will be appreciated, thanks!

Full Tilt No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG+1 ($37.85)
Hero ($90.35)
MP2 ($50.15)
MP3 ($9.50)
CO ($40.95)
Button ($20)
SB ($37.20)
BB ($21.10)
UTG ($39.85)

Preflop: Hero is MP1 with T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $2</font>, <font color="#666666">3 folds</font>, SB calls $1.75, <font color="#666666">1 fold</font>.

Flop: ($4.50) 4[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $4</font>, SB calls $4.

Turn: ($12.50) 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $12.5</font>, <font color="#CC3333">SB raises to $31.2 (All-In)</font>, Hero ???

[xeanatic]

hero folds,
I would bet less on this turn around $9
can't see your overpair being good with this turn raise.

[0524432]

Range&gt; TT on the turn is huge, esp from a blind. This is a fold every time, I don't care what reads you have.

You bet way too much on turn, no need to bet more than 1/3-2/3 pot here