Pair and nut flush draw

[salsa4ever]

9 handed. 1/2 NL

CO posts. Folded to CO, I call in button with Ah 5h and blinds complete

flop comes 5c 4h 9h

SB bets $2, BB calls, CO folds and I raise to $12

SB calls and BB folds

Turn omes Ad

SB bets $2, hero ???

[AHiltz]

Hero raises preflop. Then cbets and the hand plays much more nicely.

As played, hero makes it $20