Do you re play the same household?

I have one couple who I played right near the beginning of my time playing with sims 4 and they ended up losing their toddler to social services because I didn't understand what I was doing (and the nanny glitch). I still play the original save but I also have two alternate realities for them. One where I replayed them meeting, falling in love etc - they have different careers, no children and a large energetic dog which needs plenty of time and energy. Plus I played them again from just before they lost their child and now they have a large family of four kids. I love seeing the similarities and differences in their worlds.

I also have one other couple who have a main save but are allowed to start like premades as NPCs in every other save I play. I love them so much I just adore seeing them in the background all the time.