Send her this book:

There Once Lived a Girl Who Seduced Her Sister's Husband, and He Hanged Himself: Love Stories: Ludmilla Petrushevskaya, Anna Summers: 9780143121527: Amazon.com: Books

Because you did the exact opposite - not only did you not seduce her husband to the point of his hanging himself, but you did not go along when he wanted to seduce you. That is how good of a person you are!
Send her the book - it would be easier than explaining in your own words.

Caveat: I have not yet read the book, but I have read other books by the author and went to a presentation by her about 25 years ago, and she is awesome.

So I do not hesitate to recommend this without the benefit of having read THIS book, but just on the strength of the author's general talent.