One thing Klrxo overlooked is with the "rewiring" of the "panic room" if anything happens to the occupants that renders them unable to open the door...
they're screwed. So if Daniel ever snaps, Margot and Brook won't have a chance. Obviously Klrxo Xtreme stories are always incredibly unrealistic, but a sealed, unopenable room that could easily be filled with nitrogen gas while the occupants are distracted? Okay... Just saying.
I skimmed to the end, just to see how bad/vile the ending was, and that was the thought that struck me when Margot ordered Daniel to create an impenetrable (from the outside) fuckden.