There is a group of 5 unrelated children. Each of them has one parent who is a plumber, and another who is not,Are they the children of a plumber? Or are they the children of plumbers?
Each is a child of a plumber however since each child has a parent that is not a plumber, it would be inaccurate to say that they are the children of Plumbers since one of their parents of each child is not a plumber.
They are however children of their parents.
Okay... I surrender you to your idiotic analysis. You are beyond help.