I have a large legacy family I remade for The Sims 4. The family consists of three YA siblings, their spouses and one sibling's teen son. In the CAS demo, I made all the YA and set their relationsh...
I have this as well. For some reason my sims son is now her brother. I even moved them out of the house and remade the whole family in CAS and it still won't let me make the kid her son....