My speculations:
Josie Lau will denied any link between her and the $90K bill.
This is extremely important for her as DBS will definitely take
action if she is found to be responsible. I guess the honorary
treasurer who had supported her fully on Talking Point will take
the hit.
Josie Lau may play the "I kana death threats" card, although I'm
not sure how it will help her and her exco, other than perhaps
winning a handful of sympathy points.
Frankly, I think there is not much she can do now except to
resign.
actually by even being an executive member of a external
organisation, profit or non profit, despite objections by her bank
would be enough to earn her a black mark in the banking
industry