Sims 4 Suggestions for BASE GAME

this morning i discovered a major problem in the sims that really needs fixed. It is currently not possible to set relationships outside of a household. I'm building a youtube family with 16 kids so i need multiple households and i moved a few from one household to another and then i still couldn't set the parent child relationship. this raises the question of broken homes where mom and dad live in different homes and also what about stepparents and siblings? thinking about it this is a huge misstep and needs to be fixed. perhaps a master relationship panel over the entire saved world.