TPTK on drawy board 2/4nl

[felson]

This hand confused me. Button's preflop reraise looks suspicious.

Once the flop comes, should I plan on going to the felt? If not, how do I control the pot size?

BB sat down a few hands earlier, so I don't know much about him.

Party Poker No-Limit Hold'em, $ BB (6 max, 5 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

MP ($896.28)
Button ($332.70)
SB ($594.17)
BB ($296)
Hero ($336.90)

Preflop: Hero is UTG with A[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img]. SB posts a blind of $2.
<font color="#CC3333">Hero raises to $12</font>, MP calls $12, <font color="#CC3333">Button raises to $20</font>, SB (poster) calls $18, BB calls $16, Hero calls $8, MP calls $8.

Flop: ($100) A[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, <font color="#CC3333">BB bets $30</font>, <font color="#CC3333">Hero... ?</font>