Keeping secrets

Lindsay • married to a wonderful man, have 2 angel babies, and pregnant with our rainbow baby boy

Not sure this is the right group for this but, Say your best friend told you something about her boyfriend who happens to be your husbands best friend. And she asked you not to tell your husband, but what she told you could possibly affect their friendship probably wouldn't cause them not to be friends anymore but it would cause an argument. Do you tell your husband or not? (in case your wondering what she told me, she told me her boyfriend started taking steroids)