Whoever speaks, is to do so as one who is speaking the utterances of God; whoever serves is to do so as one who is serving by the strength which God supplies; so that in all things God may be glorified through Jesus Christ, to whom belongs the glory and dominion forever and ever. Amen. (1 Peter 4:11)
your fellowship community/church doesn't do anything when professing
Christian couples who are part of your fellowship are fornicating (&
maybe even shacking up), prayerfully consider finding another local
body of believers. If your church is just going to marry the fornicators
instead of practicing biblical discipline for Christians who are
sexually immoral, that isn't right. If this describes your fellowship,
I've got to be honest with you.
You are in a place that isn't a real church at all.