What happened in your first ever Sims family?

I started playing The Sims ten years ago and started with the Goth family. I was amazed when the ghosts spooked Mortimer and Bella when they were sleeping downstairs. I didn't know any cheats to add funds to the household, so it took a while before I could add a bedroom upstairs. I also foolishly killed them with the Guinea Pig I bought for the family who bit them! Cassandra was the last survivor who lived on snacks, ordered pizza as well as the plate of cookies but died shortly after - I couldn't get an adult to move in with her and there was no option for other families to ask her to move in although she had some friends? Why or why did I save the game after the death of Bella and Mortimer?
I also made a Sim (me) and played this household for weeks working on skills, promotions etc. When I played other Sims in the neighbourhood, my Sim (me) would show up - take out her mirror and freshen her make up - am I really that vain! :)