Forum:Sims 2 Cassandra Goth Glitch

I have been playing my custom neighborhood (Terabithia) for ages now. Kaylynn Langerak and her family are the main people that I have been playing. I got Don Lothario married to Cassandra but then leave her for Kaylynn, making Cassandra Goth go insane. Don then left Kaylynn (after having twins with her) for one of the Caliente sisters. But that is not my problem...I went to play the Goth family to send Alexander to collage and Cassandra just dissapeared from the family. Her icon just went and she wandered down the road and dissapeared. I tried again and the same happened. This now means that I cannot play the Goth household. Also when the family is loading it shows Don still in the household. Can someone please help and tell me if this has happened to you too! Thanks so much...it would be a real help!!!