OK this is sounding bit strange…
If I understand you correctly they both comne from good practcing Catholic families and they still hold to and practice their faith.
By that I am assuming they still come to Church (even if not like clockwork), they would perhaps pray outside of mass and might even be involved with the parish outside of Sunday mass?
Yet they cohabitate without any self-doubt as to the Catholic appropriateness of this and when it comes time to do the right thing they believe a civil service (without so little as approaching their parish priest for permission let alone to do the service) is the appropriate thing for Catholics to do…
Something doesn’t gel here, these are not the actions of living believers
(at least not that of those who know what their faith is about)
Is the judge a Catholic perhaps?