Ayn rand's open affair with Nathaniel doesnt make any sense in light of her own philosophy ?

Ayn Rand said my personal life is a post script to my works/novels : it consists of the sentence "And I mean it ". I have always lived by the philosophy I present in my books - and it has worked for me , as it works for my characters .The concretes differ , the abstractions are the same. But as stated in " The pion of Ayn Rand " - she had an open affair with Nath for just a year or so , as she couldnot see herself as an old woman chasing a younger man . It is appalling to know that she could even think of such an arrangement. Also she swore to secrecy everyone who was involved in this immoral arrangement , thou she said one doesnot need to hide one's love ...which is the reflection of our highest values in another person.? I have always strongly felt that a philosopher has to first live the philosophy he/she teaches and i feel in this aspect (only ) Ayn Rand failed . Agree or disagree ? Im an admirer of her work but this is disillusioning , does it mean that when it comes to be