Are you sure about that? Though the genealogy in Luke does not Mention Mary by name, scholars maintain that this is the lineage of Mary, because it's different from the genealogy of Joseph mentioned in
Matthew 1:1-16 and mentioning women in genealogies was not standard practice. It should go without saying that since Jesus was born of someone descended from Adam that He can trace His genetic lineage to Adam, as shown below.
Luke 3:23-38
23And J
esus himself began to be about thirty years of age, being (as was supposed) the son of Joseph, which was
the son of Heli,
...
...
...
38Which was
the son of Enos, which was
the son of Seth, which was
the son of Adam, which was the son of God.
This is the unavoidable truth. In order to achieve the effect you desire God would have needed to form Jesus from clay or materialize Him out of thin air.
Since Jesus is descended from Adam and was sinless, then children are sinless.