99 overpair and gutshot, lots of action

[Ryan11]

Button: 40/21/1.89
SB: 75/46/2.3 a complete maniac
MP: 18/7.9/1.74

After not folding preflop is this a standard line? What about when it's 2 back to me on the turn? I guess the pot is way to big to fold for 1 bet on the river.

PokerStars 10/20 Hold'em (6 handed) FTR converter on zerodivide.cx

Preflop: Hero is BB with 9[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/diamond.gif[/img]. CO posts a blind of $10.
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">Button 3-bets</font>, <font color="#CC3333">SB caps</font>, Hero calls, MP calls, Button calls.

Flop: (17 SB) 5[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, MP folds, <font color="#CC3333">Button 3-bets</font>, <font color="#CC3333">SB caps</font>, Hero calls, Button calls.

Turn: (13.50 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls, <font color="#CC3333">Button raises</font>, <font color="#CC3333">SB 3-bets</font>, Hero calls, Button calls.

River: (22.50 BB) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls, Button calls.

Final Pot: 25.50 BB