At the request from the Royal Household, and depending on how the US Attorney General wants to deal with this (i.e. he can advise the lawyers acting what they need to do in the 'National Interest') , it will likely be settled out of court. But you can't bet on that. My take on this, given that she has already been given a hefty payout, is that she is after the lottery win, so it probably all about money. This is actually better for him in many ways.