It is unmistakably nasty to assume that someone just stupidly "lost track" of $90,000, as the first answer suggested. Think about it, if she had simply "lost track" of the money, I wouldn't be here asking for legal advice, would I? I am no stranger to internet forums and I think I have a pretty thick skin, but that was blatantly uncalled for.
That said, tone is difficult to judge without the help of vocal inflection, so I'll give you the benefit of the doubt. Thank you for the information.

