The various guides within Geni state that the immediate family (husband, wife, children) should be listed in the About Me section of each profile.
I can see no reason for this because Geni displays these automatically in the profile.
If a child is added, does anyone go and change the 'About Me' for both the father and mother? I think you know the answer to that one. I frequently meet the situation where the father and mother have different numbers of children, and these are different again to the actual tree.
Why not just leave it to Geni - it saves entering needless text that causes more work - and confusion later.