“Walking down the aisle”? If she is referring to an aisle in a Christian CHURCH, she needs to realize that at the moment of marriage she is no longer an INDEPENDENT woman, but rather joins into “one flesh” with a husband. If she persists in this egotistical ideation of an “independent woman” into her marriage, then chronic disagreement is in her (near!) future.
Furthermore, if she is referring to an aisle in a CATHOLIC CHURCH, then she should take seriously the Catholic teaching that, in the sacrament of marriage, the ministers are the two people stating the vows publicly; so she and her fiance’ should enter the church and walk down the aisle together.
Not a Catholic, but I've been to many Catholic weddings, and I've never see that tradition. I've always seen the groom enter from the side of the altar area with his best man facing the aisle to await his bride, and the bride walks the aisle with her father (or a suitable substitute if he is not available, such as the mother who raised her, an uncle or a brother). Bride and groom walking the aisle side by side in a church wedding doesn't appear to be statutory in the Bible, so is it perhaps a local tradition?