@Joria Unfortunately, yes, that's exactly what we're saying. That's what happened in my game. I think every non housed sim Don (also my town mattress, or at least, one of them) impregnated disappeared with their children in tow. Maybe they all found out about each other?
And there's no legal way to house them, I believe.
ETA: I also have difficulty finding the older sims things to do. I'm definitely using the immortal jail strategy for my sims; I dont think I could get through it otherwise. Even with that the last two weeks have been tedious; 8 sims in the house, gen 2 still a baby/child, founder finishing up the odds and ends of her requirements (whims, friends, museum pieces) and waiting to age up to elder. There wasn't enough to do to be interesting but there was still enough that I couldn't just speed 3 the entire thing.