If your sister is unable to pay for an attorney, the court will force her husband
to pay for her attorney .
I am not aware of any repercussions for waiting to file for a divorce. I do not understand exactly what your concern is.
With regard to the waiting period of a year before getting the divorce, that is a misconception that many people have about the law in New York. That is only with regard to using the Separation Agreement as a the grounds for the divorce. If other grounds are used , such as adultery, a divorce may be filed and a judgment ordered immediately without any waiting period.
Leonard M. Weiner, Esq./Divorce Solutions