Then the Lord said to Noah, "Come into the ark, you and all your household, because I have seen that you are righteous before Me in this generation. Genesis 7:1 (NKJV)
Because Noah was considered righteous before God, he and his family were saved from the judgement waters of the great flood. The Bible says in Acts 16:31, "Believe on the Lord Jesus Christ, and you will be saved, you and your household." The Bible also tells us in 1 Corinthians 7:14, "For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband; otherwise your children would be unclean, but now they are holy." These verses reveal that salvation is for the whole house.
I have stood on verses like these many times over the years. Learning what the Bible has to say has brought one of my children off hard drugs, provided benefits of a Christian over my pre-christian children, and gave me peace through some very difficult times in my life. I have to tell you the Word of God has proven to be very powerful to me.
There are many Bible verses that we can use to declare wonderful promises over our family. However, what about loved ones from a different bloodline? In our generation, many families are made up of more than one house. We can be a parent simply by marriage. Maybe you have children who have other parents outside of your household. It could be that the other parent(s) do not even believe in Jesus.
Take notice that God said to Noah, "I have seen that you are righteous." It does not say that his household was righteous. Now look at Genesis 7:7, it says, "So Noah, with his sons, his wife, and his sons' wives, went into the ark." The salvation was even for his in-laws.
There is a bloodline much stronger than the natural one. It is the bloodline of Jesus. This supernatural bloodline takes precedence over any natural one. Even if your relationship with your children is not the way you would like it to be, your playing field is the supernatural, spirit realm.
The Bible says in John 6:63, "It is the Spirit who gives life; the flesh profits nothing. The words that I speak to you are spirit, and they are life." Keep the battle in the spirit realm where the victory is already yours. Do this by getting intimate with the Word of God. Set aside time daily to read aloud to yourself the promises of God. Find a few verses from your Bible and read them daily until they come out of you without thinking.
I personally do not believe that God wants us to have terrible trials in life---but he can still use them to bring good. There is nothing better than to experience the undeniable presence of God. Get intimate with the Word of God. It doesn't have to take a lot of time or effort. Learn to enjoy this amazing gift of life.