Can a husband prevent his wife from becoming e.g. a Shia Muslim?

Generally, the husband is seen as the decision maker in Islamic marriages, and the wife is required to obey her husband in non-haram matters. Recently, I've been thinking about the following question: **Question**: Can a husband prevent his wife from becoming e.g. a Shia Muslim? There are e.g. Sunni men who are not fond of Shia Islam, and they may choose not to marry a Shia woman. However, it's possible that a wife would like to become a Shia Muslim after marriage, and the husband may take steps to prevent this. I just pick the above as one (probably common) example, it could equally apply to a wife converting to any sect/denomination that the husband disapproves of. My thoughts: - If she genuinely accepts Shia Islam, it's hard to imagine a reasonable way this could be enforced. - Conversion could result in upset in the marriage. - Presumably, someone who wants to convert to e.g. Shia Islam would believe it's haram to not be a Shia Muslim, while the husband would think it's haram to convert. It's a mess.