MSNBC obtained a copy of the book and NBC News' former embedded reporter with the Trump campaign, Katy Tur, tweeted a highlighted section.
"Trump liked to say that one of the things that made life worth living was getting your friends' wives into bed," the starred paragraph begins.
"In pursuing a friend's wife, he would try to persuade the wife that her husband was perhaps not what she thought. Then he'd have his secretary ask the friend into his office; once the friend arrived, Trump would engage in what was, for him, more or less constant sexual banter. Do you still like having sex with your wife? How often? You must have had a better f*ck than your wife? Tell me about it. I have girls coming in from Los Angeles at three o'clock. We can go upstairs and have a great time. I promise ... And all the while, Trump would have his friend's wife on the speakerphone, listening in," the book reported.