I think I have at least one sim like this due to townie marriage after City Living. In at least one case, I was able to correct it with steps that I found on the forum. I do have at least one and possibly two sims like this in my game for whom that hasn't worked.
Joaquin's heiress wife, Eleanor Arrington, was a hostess at Chez Llama. That's the fanciest Maxis restaurant from Dine Out. She was and is very beautiful. I thought it was completely believable that she was working the kind of job that someone would who is actually quite posh. Anyway, I've just aged her up in CAS roughly in line with how she would if she were aging. I hadn't figured out the death because I have never intentionally let sims die but for realism's sake, she may need to have a laughing attack when she is older.
I think I have a CL townie who may also be like that. With a rotation, they all age rather slowly anyway. I do have a long-lived body builder but those aren't immortal in my experience. He has a number of kids in the game so I'm fine with keeping him around. I've said he is a celebrity fitness trainer. He started way before Get Famous, so maybe I can have him pursue low-level fame before his time is up.
