First, when the NYPD arrives, open the door. They probably have someone in the apartment who has gotten the right (rather, wrong) statements from the lady and he has sent a signal to the other officers. If she does not open the door, they will use a batttering ram and break it down. The neighbors will know for sure then. By the way, they will seize all cash in the apartment and later bring a civil forfeiture proceeding.
Second, if it is a one lady operation, it is only a misdemeanor. It will be approximately 24 hours before she is brought before a judge. She will spend the night in the truly depressing holding area at 100 Centre St where she can only make collect phone calls. If she intends to get an attorney, be civil with the police officer at the precinct to which she is first taken. She can make those calls at the precinct at NYC's expense. If she must leave an answering machine message, make sure to state the time of arrest, the precinct of arrest, the arresing officer's name and the section of the Penal Law that she is being charged under. Be civil to to police, but make NO statements, they will note everything she says and they will be read back to her at the arraignment as "incriminating statements".
When taken before the judge she can accept the free Legal Aid lawyer, her own lawyer will have to wait an expensive several hours to time his arrival for arraignment.
Third, at the arraignment, if she is really in doubt as to what to do, plead "not guilty". Since it is only a misdemeanor, she will be released "ROR", that is without bail and the case will be rescheduled for another date, when she can have her own lawyer present. Almost invariably the DA will offer an ACD, an Adjournment in Contemplation of Dismissal. If she has no trouble with the law for 6 months, the charges are dismissed, the records are sealed, and she may legally state that she has never been arrested. She will have to take a mandatory Court given class on Sexually transmitted diseases within the next few weeks. The second time, she will probably be offered a plea to a violation such as Disorderly Conduct. A violation is an "offense" and not technically a "crime". In a year, that record will also be sealed. She will be required to do 2 days of community service, usually at a a degrading assignment at a Parks Department facility.
The arrest will take its toll on her. The first 24 hours will truly be sheer hell. For the next few days she will be afraid the work. And the fear will last several months, at least. Not all, but most cops will be obnoxious and try to break her down. Once she is in handcuffs they will never let her go before appearing before a judge. So, don't bother trying to talk yourself out of it--it can only backfire. Remain calm, do not lose your cool, brace yourself for an ugly night. But it will be over.