Inheritance issues nearly always add stress when one child has performed more caregiving duties to aging parents than another. Emotions run deep, perspectives differ, and even people who strive to live their lives according to the guidance of God's Word can stumble.
The solution is to trust the Lord for our own well-being and that of our children, to pray for one another, love each another, and let God's peace rule in our hearts. We can cry out to the Lord with the hurt of what we perceive to be inequity, allow for different points of view, and pray not to do damage out of our sense of injustice or fear of lack.
In matters of inheritance of wealth or possessions of those who've gone before, we often aren't really afraid that God's will won't be accomplished; we are afraid we won't like God's will. When we strive to take control of a situation out of a desire to lessen our own stress level, we risk causing turmoil that does not yield the results we had hoped, and may actually work against our own well-being. Peace floods our hearts when we say to the Lord, "Thy will be done."
It is actually freeing to recognize one's helplessness to influence a situation, even a situation we believe is unjust. As we let the music box of circumstances play its crooked melody, we can trust the Lord to elevate the imperfect into a tune of redemption that has power to undo any harm human sin or negligence has wrought.
We can trust the Lord for the future both for ourselves, and for our loved ones.
But I trust in you, Lord;
I say, “You are my God." My times are in your hands...
Psalm 31:14-15 NIV