I have never heard of that before either, and don't recall any scripture saying where you should go to church. I personally feel, and have been taught in church, that God calls you to be covered by a particular pastor that is going to feed your personal spirit. Everyone does not belong to every church, that's why we have so many. Your spirit feels a connection when you go to the church that you are meant to be in, and if you question anything, Always pray and ask God for clarity. If you can go to church and know the sermon was directed to you, every time, then God is talking to you through the pastor He has put in your life. He has a message for all of us and what is meant for you is what you will hear and get from it every time.
When a person reads the Bible, they sometimes interpret it in their own way. When you read the Bible you should ask God for clarity and understanding, to open your eyes and ears and mind to hear from Him, so that you are not making your own interpretation, as your pastor's wife has Obviously done. But as previously stated, if it is bothering you to know, then I would definitely pull her to the side and ask for an explanation.
Regional Sales Director with Ameriplan USA®