I am not a teacher.
When addressing a business letter to a married couple with different last names, first party a doctor:
Is "Dear Dr. Jones and Ms. Smith"
more correct than "Dear Dr. Jones and Mrs. Smith"?
It seems to me Mrs. Smith would refer to Ms. Smith's mother.
Please advise. - Thanks!
Use "Ms." I don't think "Mrs." is used at all by women who keep their maiden names.