So as things started out Blake and Alexis had two children, but due to necessity the writers managed to pluck another two out of thin air. What if necessity dictated that they come up with another one? Could it be done? What if one week Gordon Thompson or Jack Coleman looked at Esther Shapiro funny or demanded their own parking space, then what? Of course there's always yet another recast but suppose we rule that out, could they have magically made another Carrington offspring appear? Let's not go with Blake having fathered another child with someone else cause that would be too easy. Here's a few thoughts... Alexis lied about Amanda's birth and she actually had twins, or even triplets, which she shipped off to various cousins because none wanted to be lumbered with the lot. This could conceivably allow for one or two more children to exist without things getting too far fetched. As happened to both Angela Channing and her daughter Julia, Alexis had a child which she was told died at birth but was actually taken from her and raised by someone else. Alexis was abducted by aliens who removed her unborn child and wiped her and Blake's memory that she was ever even pregnant. This child later became queen of their planet and sent a spaceship to search for her sister Fallon, who she finally tracked down in California in 1987. She decides to conquer earth, starting in Denver.