Well you are the spiritual leader household, so if the Lutheran church is not teaching completely sound doctrine, know if you stay there, you will have to give an account before God of why your family (and your wife) did not grow as much as they could have, otherwise. Exercise discernment and biblical conviction and look for a Reformed Bible Church. By "submitting" to your wife by going to her, church I dare say what you are doing could not be biblical, even if done so in love. Realize that even family can become an idol. We are to have Christ centered lives that put God-family-church-ministry. At the same time notice that I am not saying the shove Calvinism done your family's throats as there is also waiting on God, to "enlighten them" yet be a good example emulating that of Christ and the church with you and your wife, and wash her with the word, and encourage practical holiness and sanctification by firmly but loving guiding them to a Biblical uncompromising church, in every detail, including Baptism.
Grace to you brother.
Mar 3:32 And a crowd was sitting around him, and they said to him, "Your mother and your brothers are outside, seeking you."
Mar 3:33 And he answered them, "Who are my mother and my brothers?"
Mar 3:34 And looking about at those who sat around him, he said, "Here are my mother and my brothers!
Mar 3:35 Whoever does the will of God, he is my brother and sister and mother."
Luke 14:26 If any [man] come to me, and hate not his father, and mother, and wife, and children, and brethren, and sisters, yea, and his own life also, he cannot be my disciple.