Since, apparently, at least one reader has become hopelessly confused by posts on Christ's headship, here's a little primer on some of the very basic Christological doctrines, drawn from the WLC:
Q. 36. Who is the mediator of the covenant of grace?
A. The only mediator of the covenant of grace is the Lord Jesus Christ, who, being the eternal Son of God, of one substance and equal with the Father, in the fullness of time became man, and so was and continues to be God and man, in two entire distinct natures, and one person, forever.
Q. 37. How did Christ, being the Son of God, become man?
A. Christ the Son of God became man, by taking to himself a true body, and a reasonable soul, being conceived by the power of the Holy Ghost in the womb of the virgin Mary, of her substance, and born of her, yet without sin.
Scripture says that (not in those words) and I believe that.