I am really wanting to join the Catholic faith. I have been reading as much as I can and I understand the Churches position on birth control. My question: Will my Baptist wife (who will not convert) refusal to stop taking birth control mean that I will be living in sin? Thanks in advance.
No, you are not " living in sin." You are morally obligated to defend your beliefs and, when appropriate, explain your beliefs to your wife. But you are not morally responsible for her use of birth control. Everything that is under your control is being done with the correct intention and act. That is all that the Church asks of you.