She can petition the court for a modification to her alimony.
There is a mechanism that allows for a spouse to petition for a change in circumstances
The NJ case is Crews v. Crews, 164 N.J. 11
That case held: Defendant wife filed a motion for modification of a rehabilitative alimony award. The motion court denied the motion, the appellate
court affirmed, and defendant appealed. The court held the standard for a motion for modification was whether the supported spouse could maintain a lifestyle that was reasonably comparable to the standard of living enjoyed during the marriage. If the supported spouse could not, and if the supporting spouse's financial condition permitted, a modification to the support award was appropriate and warranted. The court found the trial court made no specific finding in respect to the marital standard of living. Therefore, there was no assurance that in setting defendant's support award, the trial court concluded that it would provide her with adequate resources to enable her to support herself in a lifestyle reasonably comparable to the lifestyle that existed during the marriage. The court reversed the decision and remanded to the trial court for further proceedings.
SO, if your friend can show that the standard of living has dropped and that the ex can afford more...then she will have a good case
Make sure she hires a good attorney
Talk to several...find out there experience with such cases and their record. Talk to former clients to verify they were happy. Its a buyers market, pick a lawyer who can fight for you.
Please let me know if you have further questions; if so I will do my best to answer them. If not please hit the green accept button, its the only way I get paid.