I'm not sure about the cloning. Despite the objects and CAS items each Sims iteration bring. If you think about the order of the sims families timeline. The order is Sims 3, Sims 1, Sims 4 and then Sims 2. In Sims 3 Bella is kid, In Sims 1 Cassanda is a kid, In Sims 4 Cassandra is a teenager and In Sims 2 Cassandra is an adult dating Don. So, I feel Katrina IS their mother but she changed her name for some reason. I could see this being part of the lore. It could be said she went on a spiritual journey before her death. Do you get what I mean? (i.e boxer Muhammad Ali)
