It really seems like young people haven't been given a proper explanation of an important concept these days.
Buyer's remorse. It is a real thing, but it is no one's fault but your own.
Clearly this excludes situations of outright fraud, but lying and guilt-tripping have always been a part of every transaction since the beginning of time.
If I was a dude in this situation, I'd go hardcore on this concept and never apologize. It isn't my fault she has buyer's remorse on all of our completely consensual activity, much like in every failed relationship in the history of failed relationships. I have buyer's remorse on that expensive computer she guilted me into buying her, does that mean she is going to lose her livelihood?
Just hammer that shit home at every opportunity. Your career is likely over already, might as well get the real story out in front.