Submit yourselves therefore to God. Resist the devil and he will flee from you. For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places. Therefore let us cast off the works of darkness, and let us put on the armor of light. By the word of thruth, by the power of God, by the armour of righteousness on the right hand and on the left.
Prevention is better than curing.
Once sin and satan have found an entrance in one's life, family, marriage or other areas, it is so much harder to get this cleaned out and to restore the damage. You need to evaluate or reassess your situation, take your spiritual caulking gun and start repairing these cracks. You may think that the above is not the case in your situation, but I dare to tell you that you're mistaken. For if we do not abide in God, He will not abide in us. God's word does not lie, so we have to look into our own bosom.