adultery is an important part of the wedding vows- but the other vows are to love, honor, and cherish or respect
As far as I know Rudy has not spoken ill of his second wife, but she acted very badly (disrespectfully) in public while they were married and who knows what went on in private -
Like Rudy, she was also on her 2d marriage to him, and is now on her third
Maybe everyone finally found their soulmate
If Hanover's conduct was so egregious, Rudy should have filed for divorce, BEFORE he turned to another woman. And adultery shows a complete disregard of the other vows you cited: to love, to honor, to cherish, to respect. There is no greater disrespect to a spouse, nor violation of marriage vows than adultery.
Rudy Guiuliani has NO honor.