Sims relationships are messed up
Hello, I've been having this problem for a while now, but I decided to overlook it since I believed it was a bug or something. I have a household of two sims which are like the third generation of a couple of sims I've created. They are lovers, they are not related since I was able to get them together, but when in CAS mode (with cheat), I can't make them have a kid by playing with genes and that is only available to this certain specific couple. I simply can't create a kid that has the genes of the mother and the father. Also, while I was looking into finding a solution for this problem, I realized that when in cas mode (with cheat) and I click to create a sibling for ANY sim in the game, the game will create you one but I don't have the option of SISTER/BROTHER in the relationship panel. I run out of ideas and I don't know how to solve this problem.