2/4 NL - TPTK/NFD to bet/raise on flop

[Burdzthewurd]

2/4 NL FR but 6-handed at time.

SB likes limp/calling preflop then firing pot on any flop but has folded when raised. He's donkbet 2nd pair, no kicker down before as well. I'm actually BB in this hand but for all effective purposes I'm an unknown here (I have no reads on Button). What's your play if you're the Button here (from flop beyond, raising pre should have been done).

Effective stacks:

Button - $550
SB - $423
BB - $502

3 folds, Button limps with A[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/club.gif[/img], SB completes, BB raises to $26, Button calls, SB calls.

Flop 3[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/diamond.gif[/img]

SB bets $54, BB raises to $140, Button?