I would think a settlement is likely. If he's not guilty, she's going to take the settlement and run. If he's guilty, she may well rather end it with something than face a jury and have to recount the most horrific thing that's ever happened to her, knowing that in such a high-profile case people will be glued to every word.
If I were in her shoes (assuming he's guilty), I'd take the money. Justice would not be served, but if you find yourself in that situation, sometimes your own peace comes before the greater good. At least he's been exposed and other women will be warned.