At the moment, I have 23 households (97 played sims in the same save). It can get a little confusing, especially when some relatives in the legacy challenge have similar genetics. That's why I use the Plum Tree App. At the moment, the family has spanned six generations. Sometimes when my favorite Sim households are out and about, there would be distant relatives on the same lot. If I play a certain household for a storyline, I stick with the household until the storyline is finished. Usually, my stories have drama in them... and a bit of magic and action, too!