When you have children a family rosary is admirable and advisable but 2 people, even a couple, are not necessarily on the same spiritual level. Over the years your spirituality should blend together but the OP doesn't say how long they've been married.
Some people have longer periods of meditation when they pray.
I'd advise opening up a calm conversation about this. Maybe start with praying the rosary together one day a week and let the graces take it from there.