IslamicAnswers.com: Islamic Advice

Should I tell my husband´s friend, she is cheating?

I have 2 friends at work and one of them is a woman and she is cheating on her husband with my other friend. They both told me so themselves but she is a muslim and she says she is very happily married but want to know other man and she has no respect for religion or her husband as she is cheating on him. she is also mother ….