Okay, so I've got this neighborhood with about five families in it, three of which have family ties, and the lot in question is composed of Fergus, his son Franklin, Franklin's wife, Lil, their three kids, Frankie, Farley, and Lana, and two pets, an adopted neighborhood stray dog and a purchased cat. Lana recently grew from child to teen, and I 'forced' Frankie and Farely to grow into Young Adults without a University, as I didn't want to add one (they commute to class, or whatever, thanks to a hack
). Lil's pregnant for the first time in-game (the other kids are CAS), and everyone has a job except Fergus who is happily retired.
Last night I checked in with the Lot, and the splash screen showed the happy family with the most recent clothing changes. Lot loads and it takes me a minute or two until I notice Frankiln's pic is gone. He's nowhere on the lot, and he's no longer in anyone's relationship listing! In fact, I checked Lil's pregnancy, and the father is 'Template Sim'! (Checked wants/fears for everyone, just in case they wanted to resurrect him or something, and he had died while I wasn't looking. Nothing.)
So I got out of the game and opened up SimPE, and there's no memory of Franklin anywhere, including the two other households that contain HIS brothers, or the woman he had a brief affair with! Deleted Sims leave more of a trail!
Lil's started to notice her Brother-in-law, so I guess things will turn out okay, but that was weird.