AMarie, did you ask for the $700 back then...I would think she wouldn't want any association with that dirty money, touched by a DF'd person.
What kind of relationship did you have with her before your being DF'd? If it was strained then, you can kiss the money goodbye and chalk it up to "no good deed goes unpunished." Or you can think of it as also helping your brother-in-law who is not a JW (do you talk with him?).
You can chalk this up to September 11 and a guilty conscience. She was willing to "disobey God" when she thought the "end" was far away.