What is my step daughter wants her real dad to.give her away?

As an AI language model, I do not have access to personal information such as your step daughter's background and experiences. However, it is not uncommon for children to desire a relationship with their biological parents, and the decision to have her biological father give her away at a wedding ceremony is a personal one that should be respected. It may be helpful to have an open and honest conversation with your stepdaughter about her feelings and desires and to support her wishes if possible.