this just happend to me as well, took one of my sims to the gym to work on his goal while his pregnant wife stayed home, I get the scenario complete at the gym saying that they are "divorced" but they are still married
I had all of these happen and even one time when I had saved while one was at work (normally not an issue, but it is if you load it from that point, apparently). I had to do a lot of reloading to manage this scenario.
The same issue here. I logged in the game when one sim was at work and the other at home. The other sim also lost its job. Not sure if that might have caused it too.
Bug appeared when loading the game.
