99 donkbetting the turn

[Pharity]

Too bad I got no reads on these guys. So we have to assume they are standard Crypto 2/4 players. What do you think about this line?

Crypto 2/4 Hold'em (10 handed)

Preflop: Hero is CO with 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Hero raises</font>, Button calls, <font color="#666666">1 fold</font>, BB calls.

Flop: (6.50 SB) T[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">Button raises</font>, BB calls, Hero calls.

Turn: (6 BB) 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>...