If she is interested, then ultimately, she is the one who has to pursue it. This is not something you "make" her do. She has to do what she desires to do and to hopefully include you in a way that you are both comfortable with. Since you have talked to her about it, I guarantee it's on her mind. She is probably still trying to figure out why you want this and exactly what you want out of it.
Does she ever bring the subject up? Has she asked why you want this? She can't give you what you want if she doesn't know. Do you want to watch or listen? Do want her to go out and tell you about it later? Have her bring men home to have her in her marital bed?
She probably has a lot of questions and if she is "shy and awkward", she will be hesitant to ask. But if she is really interested in cucking you, she will ask, and you need to give honest answers, even if it feels a bit humiliating.