It is in fact traditional formal style, at least in the U.S., when writing the name of a married couple with a shared last name, to put the _woman's_ name first

It is in fact traditional formal style, at least in the U.S., when writing the name of a married couple with a shared last name, to put the _woman's_ name first: "Jane and John Doe". In contrast, when using the titles it is the man's title first: "Mr. and Mrs. John Doe".