Punjabi dude .. if u need her to be on ur file, you need to furnish a civil wedding certificate. And since your wedding is taking place post u receiving your MR etc, for CIC you are the sole applier for PR and they do not care about your to be wife yet. If you were married before you got ur MR then u would be in a fit because when you would apply for her later and they would ask for the certificate, they would see the marriage date (which would be ideally before you getting your MR).
Your only best option is call CIC tell them you arent legally married yet and you've got ur MR, and your taking a vacation to go and get married, to which 75% they would say k once your married to her, you would need to apply for her as a dependent and show your marriage certificate.
Currently as of now, there isnt anything you can do, but just await for your PR