Yes, from human perspective. As an irrelevant to your story tangent, from the metaphysical perspective, I believe that's all 100% contracted. I don't think there are any accidents in our DNA and to whom we are biologically related.

Certainly doesn't mean we have to like them. I subscribe to the most likely invented quote, "The blood of the covenant is thicker than the water of the womb." And I love this from Tennessee Williams: “Friends are God’s way of apologizing to us for our families”