My current save is all about occult familyplay. Have been playing it since sometimes this summer.
My founder had 4 kids, the oldest son has a family of his own that is my main family. The second son also have a family.
My main family does not have servants but all sims in the extended family gets to come over and visit for 2 or so days. While there they are one of the main family, help out but have fun too. That way the extended family gets to have friends and clubs and my main family get to know everyone.