I don’t think so. If someone doesn’t have their own Mesorah, they are permitted (for the better part) to choose their own “minhagim”. (This is limited to certain cases, some things have a default in Halachah unless you have a Mesorah differently)
I don’t see why the wife wouldn’t have to follow the husband like any other wife.
And I definitely don’t see why her minhagim should be the trendsetter.