My fiance will not be having his parents at our wedding for various reasons. He has asked his father's brother and sister to step in and take their place. They are also going to be paying for portions of the wedding. How do you suggest we handle this situation? We feel like they should be included on invitations, but are unsure of the wording. We are also unsure of how to handle the "Mother Groom dance" since that will be done with his aunt (he wants this dance to still occur).