It seems to me that if Mr. has a period, then Mrs. should also have a period.
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adonis1013Is it necessary to put a period right after the names or is it optional?That depends on the variety of English you want to use. As CJ has explained, a period is standard in American English. In modern British English no period is usually used. However, this hasn't always been the case. About 50 years ago it was normally used in British English, too