If you are living with someone who is not your spouse, having sex outside of marriage, watching pornography, lust which is adultery of the heart, adultery, homosexuality, etc. and call yourself a Christian you must repent and turn from your sin. Don't try to justify it, or twist Scriptures, the Word of God is clear. Those living in sexual immorality will not inherit the kingdom of God. In fact, the Bible says that if a professing believer does not repent of their sin and turn from it they must be purged from the body of Christ. This is the most loving thing a congregation can do, as we pray it will be a wake-up call and that the person would truly repent and truly believe and return to the fellowship of the church and live the Christian life of holiness.