My first multi-generational game family I had these things happen –
The founder John Allen and his wife Kaylynn had a son - and after High school I took over the son’s life, and moved out; leaving John and Kaylynn in the house they had built and expanded.
John was the emperor of evil, Kaylynn was a stay at home painter (pre-ambitions), and the income stream was really high when I moved the second generation sim out.
Eventually I visited ‘my parents’ and John had been demoted to level 9 of the criminal career and Kaylynn was in the music industry, though she had completed her Life time wish when I was still controlling the household. They also had 2 more sons on their own, who were virtually identical to the first son I was now playing out. No cribs in the house, and I didn’t see the sons until the teenage stage.
There was also a story progression moment where my current sim was sleeping. A cinematic started. John and Kaylynn were robbed of everything in their home. That is the only time I got to see a cinematic event in the game. I even had left the burglar alarm for them. I visited the next day off that I had, and their house was refurnished.
Not completely related- but same families and part of the progression:
My new sim had met and married Sandy French. We invited his parents and her Mom Molly for a party. Molly passed away during the party. River was there and she, Sandy, and my new sim all were crying; and John and Kaylynn who both had the evil traits laugh were fiendishly delighted.
Incidentally, I never did see any dead or living cats in any boxes in the game
just kidding...