That's awful!!
I just read the whole thread, and finding out this was very disappointing. Ok, good luck in your next attempt! I vote for continuing with the same Sim, and in the same neighborhood. I find it weird to see the same Sim in a different town. Or, if you really want to visit another neighborhood, make a new Sim. But still no, stay with the same Sim in the same town. That's my advice. After all, Sims is just a game. Don't worry that she died so soon. You're at least lucky enough that it was now, think if it was in the 7th or 8th generations. That would be more terrible. Good luck