Many lesbians marry men because of social pressure, money, religious beliefs, etc. Being an out lesbian would not have been a viable choice for her as a public figure.

There are plenty of reasons to speculate about her lifestyle, but I haven't heard of any proof of what she did between the sheets.

I did see a film clip where she was leaving on one of her flights. Her husband leaned over to kiss her good-bye. She leaned away from him & shook his hand.