Are there any married couples where one is Catholic and the other is Christian?

Maybe this will help: the churches that call themselves “Christian Churches” are a Protestant denomination within Christianity whose members are referred to, I believe, as Disciples of Christ. So like Baptists, Methodists, Presbyterians, Disciples of Christ, and some others are all Protestants. Protestants, Catholics, and Lutherans are all Christians. But when you see a “Christian Church”, that’s just Disciples of Christ, which is just one small denomination of Christianity. Clear as mud now?