Agree - also she would be doing the equation of what has the biggest pay-off - a divorce settlement vs an OW, NF, PRH etc deal.
Bag of the fag packet would suggest the latter.
I also think that PH wouldnt do a reciprocal dirty laundry on her due to his own personal experience and his DCs - and possibly how it would look to his family and friends in the UK. Also I think she is the adored and he is the adoree in the relationship. So OW, NF, PRH will have only one golden goose and we can all see which one it will be and that they are keeping this long term investment warm.
KC3 may leave PH stacks of cash but this will likely be lied up in trusts that MM or any other non blood 'blow-in' will not be able to access.
I think PH is confident that he will be well looked after financially thats why he is doing only the global statesman stuff - MM on the other hand is cashing in hard for as long as she can IMHO.