I have hope that my wife will use my last name on her doctoral certificate.
Why are you expecting her the put your last name on her doctoral certificate?
It's something I've been dreaming about since we've been married.
You can always talk to he about this decision. Your name is important to her so as this accomplishment.
She doesn't know what I want, maybe she doesn't care about me.
If this matters that much to you, have a conversation with her about the situation. For all you know she may be more than willing to put your last name on her doctoral certificate.