Specific Household Crashes Game

I'll start by saying that the patches have improved my game play significantly. Until tonight? This evening, I have a large extended family of 6 siblings/households that I've been playing with the past few days. I've been rotating between the individual six houses. When looking at Sim A's memories of their cousin (Sim B), Sim B appears similar to when my sims were disappearing before the patches. When I try to go back into the household where this Sim B lives, my game crashes. I've tried a few times now. Sad day.