Yekke – true, but I hadn’t understood her question the way you apparently did. I thought that she was talking about a case in which the guy was willing to follow her minhagim, and she wanted to know if that’s okay. It sounds like she is talking about a guy who is not so religious and presumably not so knowledgeable and is happy to follow his wife.
It sounds like you thought she was asking if he HAS to follow her minhagim.
Which did you mean, LB?
I also just realized that she may have meant something different by “minhagim” than what I thought. She may have been referring to Ashkenazi/Sephardi, in which case, it would not be as simple for him to take on her minhagim.
I thought she was referring to areas in which there are different minhagim/opinions within the same “group”, and a lot of people go by what they learned and not necessarily by their parents anyhow. But I just realized I may have been wrong about what she meant.
I’m also not sure if she is talking about someone who has no minhagim or just hasn’t started keeping them yet.