I've never played the Sims 1 or the Sims 2.
My first Sims 3 family were CAS Ingleside family. There was a single mother and her children, a teenager and a child. Her LTW was to be Master of the Arts, which I never accomplished because I didn't know how, and because she died prematurely. I built their own house, using cheats, and they moved alot, eventually living at the really expensive house on Sun Song Ave? That house was a premade one, the one with a small second floor as a studio. I played with aging off. Anyway, the mother joined the Politics career and the children went to school. The mother got to around level 5 in the Political career when disaster struck. One weekend, the Ingleside family went to the gym. The mother and teenager went on the treadmills, and the child went to the swimming pool. After the mother became fatigued, there was a wish to go to the community pool. I sent them there, and they each had a sandwich. After, they all went into the pool to swim. I went to check the child's needs and suddenly everyone was climbing out of the pool. I didn't understand what happened, so I sent them back in. They kept climbing back out and suddenly on the Sim's panel thing the mother was a water ghost. She had somehow drowned when I wasn't looking for ONE second.
Her energy levels were quite high, and her hunger levels was full to the max. Everyone was mourning while the Grim Reaper took the mother. The teenager and child stayed at the pool for the rest of the day, mourning all the time and only stopping for a sandwich. They eventually got home at 2am, and hugged each other for the rest of the night, occasionally napping on the couch. (Yes, I'm sentimental like that.) The next day, they went back to school and I closed the game, and deleted the file. It was my first experience with Death and I was so shocked that now, I'm overly paranoid of swimming pools, and the Grim Reaper. I always play with aging off now.