55 from the BB in a 3 way pot...and I decided to flat call vs. station

[Worm75]

My default in this situation is to 3-bet or fold vs a Button Raiser who is this loose, but when the SB came along for the ride I decided to flat call.

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Button is running 40/19/3/200, pretty loose PF, but generally fit/fold postflop.

SB is your typical shortstack 35/7/3, calls too much oop with junk and is pretty much a calling station.
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I've only been at the table approx 30 hands, but playing snug Tag Poker and have yet to get out of line running about 24/20/4, though I doubt either of these villains is aware of that.

What do we think of my line on the flop, and what is Hero's best action on turn?

FWIW, if we flat call PF, we have to be able to win some pots when we don't hit our sets, and I feel like this is a pretty good board for me, but would like to see some discussion about it.

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

UTG: $50
CO: $50.45
BTN: $50.60
SB: $29.40
Hero (BB): $61.40

Pre-Flop: 5[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/club.gif[/img] dealt to Hero (BB)
2 folds, <font color="red">BTN raises to $1.50</font>, SB calls $1.25, Hero calls $1

Flop: ($4.50) 3[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/club.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $3</font>, BTN folds, SB calls $3

Turn: ($10.50) J[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">SB bets $0.50</font>, Hero ???