“The wife automatically becomes and adopts whatever her husband is…”
Of course, UJM is correct IF the wife chooses to do so. There are many “mixed” marriages where the couple retain elements of BOTH haskafahs, generally outside of the nusach of their teffilos. I suspect others have been to shabbos and yom tov dinners, as I have, where the cuisine could be best described as “yiddeshe fusion” . Its NOT a binary choice.