Bump for later reading!
It's quite possible that just as the wheat are the children of the kingdom, that the tares are the children of hell. In other words if the followers of YHWH are the children of the kingdom, then the followers of satan/devil are the children of hades.
Now, to take it a step further, to say that the children of satan are from the literal sperm of satan, would mean that the children of the kingdom are from the literal sperm of YHWH.
I think we need to use the same criteria for both. I think it is more likely that the examples pertain to our actions and choices in life.
There is however and I recall reading in one of these posts about the 'mark of Cain'. I'm not sure if the 'mark of Cain' is the same as the 'mark of the beast', or not, but just as there is a 'mark of the beast', there is also the 'mark of YHWH'.