wife and husband initially traditional, but wife attached to Novus Ordo family
I am a traditional Catholic and my husband is Novus Ordo. It is a challenge for us to find forms of prayer that we both are comfortable with, but we do still manage to prayer together a bit. It probably is less than an ideal amount though.
I think you need to find a way of praying that she is able to do meaningfully. While you have the authority to order her, if she merely obeyed you out of duty, she would end up going through the motions of prayer without sincerity. Pray for God to guide you in fulfilling your duty as the spiritual head of the family.
What kinds of prayers have you tried doing together? Does she object to the Rosary? Does she pray by herself?