Did you notice the appearance of Sugar's new black bra on Survivor last night? It's moments away from the finale, we've never seen it before and suddenly there it was, flashing across Matty's face while she told him what to do:
Have I missed it previously or have you also never seen it? Why has she suddenly started showing it off now?
I thought perhaps it's part of her strategy to make it to the end. She hasn't used her whole pin-up schmodel angle much so she could be making a finale play with it to guarantee that the guys are on her side.
The trouble with this theory is that she doesn't need to. Mad Bob and Matty both like her a lot already and she's turned on Kenny so she doesn't want him on her side.
The only reason that makes sense is that she's discovered a new confidence - brought on by her seeing the success of her strategic moves and her putting her mourning to rest last week, when she scattered her father's ashes.
Her new-found confidence and freedom = strip clothes off to bra. It's like it just sort of happened as she's found her inner power.