Not sure I'd agree here - am not sure a truly strong woman would stay with a serial adulterer
On the one hand i kinda agree on the other I've always felt that their relationship and its rules and history etc is between them. Not everyone defines a successful and happy relationship as being sexually faithful. They clearly have a bond on an intellectual level, a love of public service and public office - these they share totally. She had major input into his presidency as his confidant and advisor. Perhaps this is more important to her than Monica et al ?