That is bizarre.
He asks a punter, someone he threatens with blackmail, to... donate to a kids football team he runs? Sorry, that genuinely made me laugh. That's the most convoluted, oddly specific 'charity' and oddest way to raise funds.
If you had a good time with the girl (which I assume you did, since it was your second visit) see her again and if he pulls that shit, I'd agree with points raised so far:
Educate him on the laws concerning blackmail, and the laws concerning seeing an escort. One is illegal, the other is not. Also, there are more civilised ways of going about his business if he is genuinely concerned about an escort near his home. Educate him. Direct him to this forum. Also take a photo of him.