She apparently said no such thing. Perhaps if she wanted him to stop, she could have told him explicitly to STOP! By her own admission, she used ambiguous language....I should go home.....or I should leave.
The law has convicted a 17 year old boy of a serious felony and branded him as a sex offender for life for having sex with a girl who gave her permission and then during the act said "I should go home."
We now live an Alice in Wonderland existence where common sense and logic have little application. All events are viewed through the looking glass of Political Correctness which must be acheived at all costs, as it is all that matters.
This attempt at exploiting the semantics in such a situation is feeble. Am I to believe that if a murderer claims that his victim didn't say "stop" before he killed him, he 'only' said "you better get out of my house" that he would be innocent of his crime? Rape is a crime with a long history of people trying to 'blame' the victim.