2024 packs ideas for 10th anniversary

please larger household sizes that do not need mods, currently if I have five in my family say 1 adult, 2 children and 2 pets, when my sim wants to marry and when the add to household screen comes up after the marriage, family goes to red border after adding step parent, so unable to add to family, I have to use cheats to force add sim to household, the EA max is 8 but transfer between households screen only allows five max.