Our ancestors are the foundation or the root of our tree and we are the branches , If the tree is fruitful so are the branches , if it cursed like the fig tree then so are the branches.
Living in sin is living in separation from God. Being separated from God is a curse in and of itself. However, there are additional curses that have been carried down through generations based on the actions of certain individuals.
This is pretty serious. It means that if there is some type of sin that struggle with, it could negatively affect your children and your children's children. It is a generational sin and a generational curse. Break it!