Rape is based upon the allegation, but the physical evinced must also support the allegation. All of the bull crap about she lied here etc is not admissible without the judge allows it then it can be crossed. And as to a weapon, I can kill you in a second with a letter opener are a pair of scissors.
She lied under oath to the grand jury. She's done.
These "ignorant maids" know exactly what they're dealing with in this place...It's not exactly a Motel 6.
Evidence impugning the credibility of a material witness is always admissible.